104 — MAINTENANCE OF TRAFFIC 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104 — MAINTENANCE OF TRAFFIC
104.00 General
This Section sets forth the traffic control requirements necessary for the safe and continuous maintenance of traffic throughout the area affected by the work and is intended to minimize inconveniences to the traveling public, while providing for the safety of motorists, pedestrians, and workers. Maintain vehicular and pedestrian traffic on or along any transportation facility as specified in the Contract Documents. When speed of traffic is noted, this means the posted speed or prevailing travel speed, whichever is higher, unless otherwise specified. All applicable Maintenance of Traffic equipment shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3. When no longer needed, remove items used for temporary maintenance of traffic from the project site. All removed items shall become the property of the Contractor, unless otherwise specified. Ensure that at least 90 percent of all reflective barrier markers, warning lights, and raised pavement markers are operational at any given time. Correct deficiencies within 24 hours after notification. Upon initial installation, temporary traffic control signs shall have at least 70 percent of the reflectivity specified in 950.03 over 90 percent of the reflectorized surface. Channelizing devices shall have at least 80 percent of the reflectivity specified in 950.03 over 90 percent of the reflectorized surface. Replace damaged traffic control signs within four hours of notification. Take necessary corrective action, as approved, to adequately warn and protect the public until the signs are replaced. The Contract Documents will specify one or more of the items listed in the following sections. When work is specified to be accomplished under the Maintenance of Traffic item, the work will be incidental to the Contract price for Maintenance of Traffic.
104.01 Traffic Control Plan (Tcp)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.01 — TRAFFIC CONTROL PLAN (TCP)
104.01.01 Description
Develop and implement a TCP. The TCP will include the design and placement of items such as signing, pavement markings, delineation, channelization, barriers, crash cushions, and other items as required. TCPs may be implemented within a single project or jointly between two or more projects. In situations where TCPs are jointly implemented, ensure that correct and nonconflicting guidance is presented to the traveling public. Prior to commencement of Contract work, the successful bidder shall complete a Traffic Control Plan Certification. Indicate whether the Administration's TCP will be implemented (Option 1), the Administration’s TCP will be modified (Option 2), or a TCP will be developed (Option 3). Submit the TCP in writing to the Engineer at least 20 days prior to starting any work. Submit changes to the approved TCP in writing at least five days prior to implementing the change. For emergencies, the approval process will be completed within four hours. All changes to the TCP shall be approved in writing by the Engineer prior to implementation. Submit for approval supporting documentation containing an assessment of safety and mobility impacts of the modified or proposed TCP. Contact the Engineer to determine what level of detail and types of analysis are required for the assessment. No work shall begin until the required traffic control patterns and devices are in place. Refer to Contract Documents for Work Restrictions. When TCP Option 2 or Option 3 is selected, the following shall apply:
a.Plans and revisions to plans shall be drawn to the same degree, likeness, and sophistication as that of the Contract Plans.
b.Submittals shall be on sheets measuring 22 in. x 34 in. with a standard margin and a standard title block at the lower right corner approximately 4 in. x 8 in., or on 8- 1/2 in. x 11 in. paper with a 1 in. margin and a title block. Include the following information in the title block and in the order listed.
1.Name of Contractor (and subcontractor, if applicable).
2.Address of Contractor (and subcontractor, if applicable).
104.01 Traffic Control Plan (Tcp)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
3.Sheet Title.
4.Administration Contract Numbers and complete Federal Aid Number.
5."Prepared for Maryland Department of Transportation State Highway Administration."
6.Signature block for approval by Contractor's Traffic Manager and date of approval.
c.All lines shall be clean, sharp, solid, and heavy enough for adequate reproduction. The scale of phase details on the TCP shall be 1 in. equals 100 ft. Additional plans that revise the design plans shall be at the same scale as the Contract Plans.
d.Do not use white pigment to cover lines.
e.Plans shall indicate the proposed traffic movements throughout the area affected by the work for each phase of construction. Label all routes and show north arrow and any other information that would clarify the TCP. Any monetary savings from changes to the TCP made by the Contractor and approved by the Engineer will be divided equally between the Contractor and the Administration.
104.01.02 Materials
Not applicable.
104.01.03 Construction
Not applicable.
104.01.04 Measurement and Payment
Any traffic control plan developed by the Contractor will not be measured but the cost will be incidental to other pertinent items specified in the Contract Documents.
104.02 Maintenance of Traffic (Mot)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.02 — MAINTENANCE OF TRAFFIC (MOT)
104.02.01 Description
Maintain traffic safely and efficiently through and around the area affected by the work.
104.02.02 Materials
Traffic Materials Section 950
104.02.03 Construction
a.Maintenance of Existing Roadway. Maintain the existing roadway surface and shoulders, including crossroads, ramps, approaches, crossovers, medians, detour roads, entrances, and pavement markings within the limits of the project, throughout the duration of the Contract. Repair potholes, shoulder defects, and hazardous conditions that exist or develop throughout the duration of the Contract.
b.Existing Regulatory Signs, Warning Signs, Guide Signs, and Pavement Markings. Relocate, turn, completely cover with opaque material, or remove with the approval of the Engineer, signs that are not applicable due to temporary traffic conditions. Properly redisplay signs to traffic as soon as conditions warrant. Replace any signs misplaced or damaged by the Contractor's operations. Prior to construction and in the company of the Engineer, inventory and note the location, type, size, and color of all existing pavement markings, legends, and symbols. Submit the results on a marked up set of the Contract Plans or on Contractor prepared sketches or drawings.
c.Storage and Movement of Equipment, Material, and Vehicles. All equipment, material, storage, and parking areas shall have advance written approval from the Engineer. Employee vehicles shall not be parked within the right-of-way of the through highway, without a written exception. Equipment and material shall not be stored or permitted to stand in unprotected areas or open areas within 30 ft of traffic except as follows:
1.Approved traffic barrier is in place prior to storage of equipment and materials.
104.02 Maintenance of Traffic (Mot)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
2.Equipment and material is at least 4 ft behind traffic barrier as measured from the bottom, nontraffic side of the barrier.
3.Equipment or material is stored in conformance with the AASHTO Roadside Design Guide. Restore areas used for storage of equipment and material to original condition immediately upon completion of use, at no additional cost to the Administration. Vehicles and equipment shall enter and leave the work area in the direction of traffic flow. Work on or adjacent to the traveled way shall be performed in the direction of traffic flow, unless written approval is obtained prior to beginning the work. The Contractor's vehicles and equipment shall enter on and exit from the roadway at interchanges or legally allowed public use crossovers. Do not make U-turns across medians and crossovers signed FOR USE OF AUTHORIZED AND EMERGENCY VEHICLES ONLY, without written approval.
d.Warning Lights and Devices. Use warning lights and flags on warning signs as specified in the TCP, the Contract Documents, or as directed. During hours of darkness, attach one Type A low intensity flashing warning light to the traffic side of channelizing devices used to warn of a spot hazard. Attach two Type A low intensity flashing warning lights to the top of each Type III barricade.
e.General Requirements for Temporary Pavement Markings (TPMs). For pavement marking dimensions refer to Pavement Marking Dimension Table following (f)(10) below.
1.Temporary pavement markings are those markings placed upon the roadway to serve an area of work activity or a work phase for a period of time after which they are to be removed. When approved, a less than full complement of pavement markings and reduced dimension markings for dashed center lines and lane lines may be used, but for a period of not more than two weeks.
2.TPMs may be either full dimension or reduced dimension as specified in the Contract Documents or as directed.
3.Full dimension TPMs shall be in accordance with the MdMUTCD and the Pavement Marking Dimension Table following (f)(10).
104.02 Maintenance of Traffic (Mot)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
4.Reduced dimension TPMs shall be in accordance with the MdMUTCD and the Pavement Marking Dimension Table following (f)(10), except that the dashed center lines and lane lines may consist of 4 ft segments and 36 ft gaps.
f.Specific Requirements for TPMs.
1.As a minimum, place all center and lane lines at the close of each day.
2.During the work day, while work activities are underway, clearly define all vehicle paths by center and lane lines, channelizing devices, signs, or other traffic control devices.
3.Along two-lane, two-way roadways, place a center line consisting of a continuous double solid yellow center line, a single dashed yellow center line at full dimension, or a single dashed yellow center line at reduced dimension as directed.
4.Mark and sign ‘no passing zones’ as specified or as directed. A no passing zone may be identified by signing for a period not to exceed seven days.
5.Along multilane undivided roadways, identify the center line using a continuous double solid yellow line. If a two-way left turn is present, see (6) below. If the roadway is three lanes, the center line may be either a continuous double solid yellow center line or, where passing is permitted in the single lane direction, a continuous single solid yellow and single dashed yellow combination center line. For the placement of no passing zones, see (f)(4) above.
6.Along multilane undivided roadways having a two-way left turn lane, the left- turn lane need not be marked provided that the lane is continuously delineated using channelizing devices spaced at no more than 200 ft. The devices shall separate the opposing flows of traffic and provide areas where left-turning vehicles may store while awaiting the opportunity to turn.
7.Along multilane roadways having reversible lanes, mark the lanes with the full complement of pavement markings as described in the MdMUTCD.
8.Where edge lines are not in place, delineate the edge of the roadway by using appropriate channelizing devices or other delineation.
9.Specific pavement marking, and complementary signing details are shown on the Temporary Traffic Control (TTC) Typical Applications.
104.02 Maintenance of Traffic (Mot)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
10.Contact the Office of Materials Technology (OMT) for the latest approved TPM materials. PAVEMENT MARKING DIMENSION TABLE REQUIRED MINIMUM EFFECTIVE WIDTH, in.LINE TYPE MATERIAL EXPRESSWAYS AND FREEWAYS OTHER ROADWAYS Paint 5 5Lane Lines Preformed Tape 5 5 Paint 5 5Lane Shifts, Lane Divides and Severe Alignment Changes Preformed Tape 5 5 Paint 5 5Center Lines *See Note Preformed Tape 5 5 Paint 5 5Edge Lines Preformed Tape 5 5 Paint 5 5Ramp Edge Lines Preformed Tape 5 5 Paint 10 10Gore Marking Preformed Tape 10 10 Paint or Preformed Tape Same as particular line being extended Same as particular line being extendedAuxiliary Note: Provide a discernible space of 4 in. to 5 in. between double lines.
g.Channelizing Devices. Install traffic channelizing in accordance with the MdMUTCD, the Contract Documents, and the following:
1.Spacing in feet for channelizing devices in a taper shall be no more than the posted speed limit in mph.
2.Spacing in feet for channelizing devices in a tangent shall be no more than twice the posted speed limit in mph.
3.To define interchange gore areas or other unusual alignments, space channelizing devices at 25 ft intervals, unless the Engineer directs a closer spacing.
4.Space channelizing devices at approximately 6 ft intervals at driveways and intersections, so that sight distance at these locations is not restricted.
5.The Contractor’s name or identification mark may be placed in an inconspicuous location on the channelizing device, facing away from traffic. No advertising is permitted.
104.02 Maintenance of Traffic (Mot)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.02.04 Measurement and Payment
Unless otherwise specified, Maintenance of Traffic will not be measured but will be paid for at the Contract lump sum price. The payment will be full compensation for relocating, turning, completely covering and uncovering or removing and resetting, maintaining in like new condition, and cleaning existing and temporary traffic signs and other traffic control devices. Included is the inventory of all existing pavement markings and the treatment of any other traffic control device not included in these Specifications but necessary for the fulfillment of the Contract requirements and implementation of the approved Traffic Control Plan, and for all material, labor, equipment, tools, and incidentals necessary to complete the work. Payment of the Contract lump sum price will be prorated and paid in equal amounts on each monthly estimate. The number of months used for prorating will be the number estimated to complete the work.
a.When additional Contract pay items for Maintenance of Traffic are specified in the Contract Documents, measurement and payment will conform to the pertinent pay items.
b.Cones, reflective collars, anchoring devices, STOP/SLOW paddles, sign flags, and warning lights will not be measured but the cost will be incidental to the Contract price for Maintenance of Traffic unless otherwise specified.
c.Temporary traffic control devices that need replacement shall be replaced immediately, as directed. The cost of replacement, including all material, labor, equipment and tools, will not be measured but will be incidental to the Contract price for Maintenance of Traffic except when specifically set up in the Contract Documents as a separate Contract pay item.
d.Material, equipment, and labor necessary for the construction and removal of temporary or detour roads will be measured and paid for at the Contract unit price for the pertinent items used.
104.02.04 01 When specified in the Contract Documents, Maintenance of Traffic will be
measured and paid for at the Contract price per unit day.
104.02.04 02 When there is no item in the Contract Documents, maintenance of traffic will not
be measured but the cost will be incidental to other pertinent items specified in the Contract Documents.
104.03 Temporary Raised Pavement Markers (Rpms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.03 — TEMPORARY RAISED PAVEMENT MARKERS (RPMS)
104.03.01 Description
Furnish, install, and remove as necessary, temporary RPMs.
104.03.02 Materials
Temporary RPMs QPL
104.03.03 Construction
Install temporary RPMs, as specified in the Contract Documents and in accordance with the manufacturer's recommendations.
104.03.04 Measurement and Payment
The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work. Increases or decreases in quantities will not be a basis for renegotiation of the Contract unit price.
a.Temporary Raised Pavement Markers will be measured and paid for at the Contract unit price per each.
b.Removal of Temporary Raised Pavement Markers will be measured and paid for at the Contract unit price per each.
c.Reimbursement will be made at the Contract unit price for each marker damaged by snowplow operations.
104.04 Temporary Concrete Traffic Barrier (Tcb) for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.04 — TEMPORARY CONCRETE TRAFFIC BARRIER (TCB) FOR MAINTENANCE OF TRAFFIC
104.04.01 Description
Furnish, place, reset, and remove TCB.
104.04.02 Materials
Precast Concrete Traffic Barrier 950.01 Vertical Panels and Reflective Barrier Markers QPL TCB shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3.
104.04.03 Construction
Maintain TCB in alignment and in a like new condition. Remove and relocate TCBs as directed. Install reflective barrier markers and vertical panels (object markers) on the TCB as specified. Connections. In addition to the pin and loop connection shown on the Standards, the channel splice, vertical I beam, and lapped joint connections specified in the AASHTO Roadside Design Guide, and the proprietary T-Lok and J-J Hook Systems will be allowed provided only one type of joint connection is used for the length of the barrier.
104.04.04 Measurement and Payment
The payment will be full compensation for furnishing, placing, maintaining and removal from the project site as directed, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
a.Temporary Concrete Traffic Barrier for Maintenance of Traffic and Reset Temporary Concrete Traffic Barrier for Maintenance of Traffic will be measured and paid for at the Contract unit price per linear foot measured along the center line of the top of the barrier.
104.04 Temporary Concrete Traffic Barrier (Tcb) for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS The payment for Reset Temporary Concrete Traffic Barrier for Maintenance of Traffic will include removal from its original placement, transporting, and resetting it in its new temporary location.
b.Reflective Barrier Markers and Vertical Panels will be measured and paid for at the Contract unit price per each.
104.05 Traffic Barrier W-Beam (Tbwb) for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.05 — TRAFFIC BARRIER W-BEAM (TBWB) FOR
104.05.01 Description
Furnish, install, maintain, reset, and remove temporary TBWB. Refer to 605.01.01 and 605.01.02.
104.05.02 Materials
Traffic Barrier W-Beam 918.01 Traffic Barrier Posts 918.02 Hardware for Traffic Barriers 918.03 Wood Offset Blocks 918.04 Composite Offset Blocks Section 605 TBWB shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3.
104.05.03 Construction
Refer to 605.03.01, 605.03.02, and 605.03.03. TBWB. Use construction methods in accordance with the applicable portions of Section 605. TBWB Replacement. Immediately replace damaged portions of the TBWB. Install the TBWB to the correct horizontal and vertical alignment using offset blocks in kind. TBWB Reset. When work is sufficiently completed through a traffic control area and TBWB is no longer required, remove and reset the TBWB and all components to a new work area as specified. Restore the previous location to original condition. TBWB End Treatments. Refer to Section 104.09 and Section 104.10. Place an approved end treatment at all ends of TBWB prior to opening to traffic.
104.05 Traffic Barrier W-Beam (Tbwb) for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.05.04 Measurement and Payment
The payment will be full compensation for furnishing and installing all cables, posts, brackets, traffic barrier W-beam, hardware, galvanizing, excavation, backfilling, connections to rigid structures, removal, restoration of the area, and for all material, labor, equipment, tools, and incidentals necessary to complete the work as directed.
a.Traffic Barrier W-Beam for Maintenance of Traffic will be measured and paid for at the Contract unit price per linear foot.
b.Replacing sections of the traffic barrier that have been damaged by vehicular traffic while in place will be measured and paid for at the Contract unit price per linear foot for the Traffic Barrier W-Beam Replacement for Maintenance of Traffic item.
c.Reset Traffic Barrier W-Beam for Maintenance of Traffic will be measured and paid for at the Contract unit price per linear foot.
d.Temporary Traffic Barrier End Treatments will be measured and paid for at the Contract unit price per each.
104.06 Tubular Markers
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.06 — TUBULAR MARKERS
104.06.01 Description
Furnish, install, and remove tubular markers for maintenance of traffic.
104.06.02 Materials
Tubular Markers QPL Reflectorization 950.03 Tubular Markers may be manufacturer-certified as NCHRP Report 350 and/or MASH 2016 compliant as long as there are no attachments to the device.
104.06.03 Construction
Install tubular markers as recommended by the manufacturer and as approved by the Engineer.
104.06.04 Measurement and Payment
Tubular Markers will be measured and paid for at the Contract unit price per each. The payment will be full compensation for removal and for all material, labor, equipment, tools, and incidentals necessary to complete the work. Tubular markers damaged due to traffic operations will be measured and paid for at the Contract unit price per each for Replacement of Tubular Marker Mast. If the base detaches from the pavement, replace the entire tubular marker assembly at no additional cost to the Administration, unless damaged by Administration snow removal operations.
104.07 Arrow Panel (Ap)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.07 — ARROW PANEL (AP)
104.07.01 Description
Furnish and place APs for temporary use.
104.07.02 Materials
Arrow Panel QPL
104.07.03 Construction
At least 24 hours before use, furnish and test the arrow panel (AP). The AP shall be self-contained, vehicle-mounted or portable. Use a self-contained trailer unit unless otherwise specified. If a full matrix display board is used as an AP, it shall comply to this specification and it shall be able to display a left arrow, right arrow, double arrow, and a four-corner caution mode per the Arrow Panel tables. Elements. The AP unit shall conform to the Arrow Panel tables and be arranged with double- pointed arrow configuration capable of displaying a left arrow, right arrow, double arrow, and a four-corner caution mode. A sequential chevron, sequential arrow and single bar caution panel shall not be displayed. ARROW PANEL UNIT MdMUTCD TYPE Portable A, D Vehicle Mounted B Self-Contained Trailer C Arrow Board Type Minimum Size Minimum Legibility Distance Minimum Number of Elements A 48 in. x 24 in. 1/2 mile 12 B 60 in. x 30 in. 3/4 mile 13 C 96 in. x 48 in. 1 mile 15 D None* 1/2 mile 12 ∗Length of arrow equals 48 in., width of arrowhead equals 24 in.
104.07 Arrow Panel (Ap)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Type A, B, and C arrow boards shall have solid rectangular appearances. A Type D arrow board shall conform to the shape of the arrow. The color presented by the AP lights shall be yellow. Lights with the pre-flash option of white strobe or pulsed lighting shall not be displayed. APs shall have both manual and automatic dimmer devices capable of reducing the light intensity by 50 percent. Periodically clean the photocells in order to prevent malfunctioning of the brightness control. Dimmer devices are mandatory during night operation. The devices shall include a fail-safe system that ensures maximum brightness during daytime operations and a reduction in brightness of up to 50 percent during periods of darkness, regardless of which dimmer device is operational. The APs shall provide full illumination within at least a 24 degree cone perpendicular to the panel face. The flashing rate shall be not less than 25 or more than 40 flashes per minute as required in the MdMUTCD. Power Supply. The AP shall operate from a solar powered electrical system and consist of battery power and solar array panels and be capable of providing power supply to the AP for 21 consecutive days without auxiliary charge. Deployment. Place APs as specified. Maintain APs in good operating order.
a.The AP shall conform to the applicable requirements of the MdMUTCD and only be used to supplement other required traffic control devices. Use the "Arrow" mode when closing a through travel lane on a multilane roadway. Place only one AP in the "Arrow" mode for each stationary lane closure. “Arrow” mode shall not be used to indicate a lane shift. Moving work operations may utilize one or more APs for a single lane closure. Ensure that placement does not cause driver confusion near ramps, median crossovers, and side road intersections.
b.Place the AP facing approaching traffic in conformance with the minimum legibility distances specified in the Arrow Panel table. Ensure that the display is level.
c.For stationary lane closures, place the AP on the shoulder at the beginning of the taper (nearest to oncoming traffic). Where there are narrow or no existing shoulders adjacent to the closed lane behind the channelizing devices, place the AP as near to the beginning of the taper as possible.
d.For interior lane closure when the AP is displaying a flashing double arrow, center the AP in the closed lane and place it at the downstream end of the shifting taper.
104.07 Arrow Panel (Ap)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
e.For a lane closure on a two-lane, two-way roadway, or for a shoulder closure on roadways, use the “Caution” mode. In "Caution" mode, one light is displayed in each corner.
f.For moving operations, refer to Section 104.23.
104.07.04 Measurement and Payment
Arrow Panels will be measured and paid for at the Contract price per unit day. A unit day will consist of any approved usage within a work shift, regardless of start time or whether the shift runs into another calendar day. Each arrow panel will be paid for only once per unit day, regardless of how many times it may be relocated. When an arrow panel is used for part of a day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of an arrow panel, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for all material, labor, equipment, tools, and incidentals required to set up and operate at the site as required, and at any relocated site as specified and as directed.
104.08 Temporary Traffic Signs (Tts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.08 — TEMPORARY TRAFFIC SIGNS (TTS)
104.08.01 Description
Furnish, install, and maintain TTS on or along all transportation facilities.
104.08.02 Materials
Wood Sign Supports 921.05 and 921.06 Reflectorization 950.03 Sign Material 950.08 Square Perforated Tubular Steel Sign Supports As Approved by the Office of Traffic and Safety Composite Aluminum Signs, Plastic Signs, Flexible Roll Up Signs, Portable Sign Supports, and Mounting Hardware QPL Use fluorescent orange for all orange colored work zone signs. Use reflectorized signs for both daytime and nighttime use. Temporary traffic signs and supports shall conform to MASH 2016 criteria for Test Level 3.
104.08.02 01 Sign Thickness.
a.Aluminum Signs. Use the following minimum thickness for fabricated aluminum signs mounted on wood or steel tubular posts. LONGEST DIMENSION OF SIGN (in.) MINIMUM THICKNESS (in.) ≤ 12 0.040 12+ to 24 0.063 24+ to 36 0.080 36+ to 48 0.10 > 48 0.125
104.08 Temporary Traffic Signs (Tts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
b.Composite aluminum and flexible Roll Up Signs. When composite aluminum, plastic, or flexible roll up signs are used on portable supports, the support shall be approved by the Office of Traffic and Safety to hold that sign material. When supported on portable sign supports, composite aluminum signs shall be at least 0.08 in. thick.
104.08.03 Construction
104.08.03 01 Sign Design and Fabrication. Design and fabricate signs according to the
Administration’s Standard Highway Sign Book (SHSB). You may request a copy of the SHSB from the Office of Traffic and Safety, Traffic Engineering Design Division. S u b m i t designs of signs not included in the SHSB in scaled sketches for approval. Direct written requests to the Engineer. All work area warning signs with the exception of the “2(3) LEFT(RIGHT) LANE CLOSED XX” (W20-5a(1)) signs shall be 48 in. x 48 in., unless otherwise specified. Sign W20-5a(1) shall be 60 in. x 60 in., unless otherwise specified.
104.08.03 02 Sign Installation. Place signs in accordance with the MdMUTCD and the Contract
Documents. Adjust signs along the highway to provide adequate sight distance to work zone signs and existing signs. Ensure that signs are not obscured or obstructed. Ensure that supplemental signs do not cover any part of the face of the primary sign. Mount signs that will be in place for more than three working days on wood posts or on square perforated tubular steel posts, unless otherwise specified. Do not place any additional bracing on wood posts unless the sign is behind a protective barrier. The tops of the wood posts shall not protrude more than 3 in. beyond the nearest edge of the sign. Portable sign supports shall be self-erecting. They shall be able to withstand a wind velocity of 70 mph and be able to maintain themselves within 5 degrees of rotation around their vertical axis. Do not install signs before they are inspected and approved. Do not display signs to traffic until directed. Properly maintain the TTS, leave in place while applicable, and remove immediately when no longer required. When operations are performed in phases or stages, display only those signs to traffic that apply to the present conditions. When one or more signs do not indicate of actual conditions, such as during periods of temporary shutdown or extended periods of no work being performed (including lunchtimes and overnight periods), remove the entire work zone setup, remove the inapplicable signs, turn them away so they are not visible to any traffic, or completely cover them with an approved opaque material. When signs are no longer needed, remove temporary traffic signs, associated materials and incidentals from the project site. Remove materials become the property of the Contractor.
104.08.03 03 Sign Maintenance and Sign Replacement. Maintain signs in a new or like new
condition. Maintain sign faces free of tape, tape residue, or any other foreign matter. Remove all advertisements from signs and supports.
104.08 Temporary Traffic Signs (Tts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS When directed, replace signs with poor reflectivity or those that become faded, illegible, or damaged. Signs that are not new may be used only if the reflective intensity at a divergence angle of 0.2 degrees and incidence angle of minus 4 degrees conforms to at least 70 percent of the values as specified in 950.03 over 90 percent of their reflectorized surface. At other times throughout the duration of the Contract, the sign reflectivity intensity shall be at least 60 percent. The acceptability of the signs shall be determined by 1 ft square test plates calibrated in accordance with these requirements.
104.08.04 Measurement and Payment
104.08.04 01 Temporary Traffic Signs will be measured and paid for at the Contract unit price
per square foot of sign for the Temporary Traffic Sign item. The payment will be full compensation for furnishing the signs and supports, installation, relocation, maintenance, cleaning, replacement due to non-traffic damage and normal wear, removal, and for all materials, labor, equipment, tools, and incidentals necessary to complete the work.
104.08.04 02 Where signs have been set and damaged by traffic, and the Engineer determines
that they are not repairable, replacement will be measured and paid for at the Contract unit price per square foot of sign for the Temporary Traffic Sign item. The payment will be full compensation for furnishing the signs and supports, installation, relocation, maintenance, cleaning, removal, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.09 Temporary Traffic Barrier End Treatments
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.09 — TEMPORARY TRAFFIC BARRIER END TREATMENTS
104.09.01 Description
Furnish, install, maintain, reset, and remove temporary traffic barrier end treatments in conformance with the manufacturer's recommendations or as directed. Refer to 605.01.01 and
605.01 02.
104.09.02 Materials
Temporary Traffic Barrier End Treatments Refer to the Contract Documents or QPL Temporary Crash Cushion Sand Filled Plastic Barrels (SFPB)
104.10 02
Temporary Traffic barrier End Treatments shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3.
104.09.03 Construction
Refer to 605.03.01, 605.03.02, and 605.03.03. Document each step of the installation, and complete and submit the manufacturer installation checklist for the installed product. Temporary End Treatments.
a.Install Temporary Traffic Barrier End Treatments as specified on the Plans and the Book of Standards and according to the manufacturer’s instructions. The nose section shall be reflectorized as approved by the Office of Traffic & Safety.
b.Install SFPB as specified in 104.10.03.
104.09 Temporary Traffic Barrier End Treatments
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Inspection of End Treatments.
a.Perform a daily visual inspection of the devices to ensure that no damage has occurred, and that the end treatment is capable of functioning as intended.
b.Following an impact, an approved reflectorized drum will suffice temporarily as reflectorization for the end treatment. Repair or replace the damaged end treatment within four hours after notification.
104.09.04 Measurement and Payment
Temporary Traffic Barrier End Treatments, Remove and Reset Temporary Traffic Barrier End Treatments, and Repairing Temporary Traffic Barrier End Treatments will be measured and paid for at the Contract unit price for one or more of the items listed below unless otherwise specified.
a.Temporary Traffic Barrier End Treatments will be measured and paid for at the Contract unit price per each for the type specified. The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to provide a complete temporary traffic barrier end treatment.
b.Temporary crash cushion sand filled plastic barrels will be measured and paid for as specified in 104.10.04.
c.Remove and Reset Temporary Traffic Barrier End Treatments will be measured and paid for at the Contract unit price per each for the type specified. The conditions specified for the initial installation and removal of the end treatment shall be applicable to removing and resetting the end treatment.
d.Temporary Traffic Barrier End Treatment Spare Parts Package furnished and installed will be measured and paid for at the Contract unit price per each for the type specified. The payment will be full compensation for the complete clearing and removal of debris and damaged unsalvageable parts, and for all material, labor, equipment, tools, and incidentals necessary to construct the temporary end treatment to the configuration specified. When spare parts packages are furnished by the Administration, Repairing Temporary Traffic Barrier End Treatments will be measured and paid for at the Contract unit price per each for the type specified. The payment will be full compensation for pickup and all transportation, installation, reconnection to fixed objects where necessary, complete clearing and removal of debris and damaged unsalvageable parts, and for all material, labor, equipment, tools, and incidentals necessary to construct the temporary end treatment to the configuration specified. Payment will not be made for spare parts packages used for end treatments damaged due to the Contractor’s operations.
104.09 Temporary Traffic Barrier End Treatments
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
e.Removal of the temporary traffic barrier end treatments will not be measured but the cost will be incidental to the initial Contract unit price per each. Removal shall include patching of any holes made to anchor or stabilize the end treatment, and cleaning and clearing the area of all debris.
f.Refer to 605.04.19.
g.Refer to 606.04.12.
104.10 Temporary Crash Cushion Sand Filled Plastic Barrels (Sfpb)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.10 — TEMPORARY CRASH CUSHION SAND FILLED PLASTIC BARRELS (SFPB)
104.10.01 Description
Furnish and install SFPB.
104.10.02 Materials
Sand 901.01 Plastic Barrels (Yellow) QPL SFPB shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3.
104.10.03 Construction
Prior to installing the SFPB, level the ground supporting the system utilizing material comparable to the existing ground or as approved. The components, assembly, placing configuration, and filling of the individual plastic barrels with varying weights of sand shall be in accordance with the manufacturer's recommendations or as specified in the Contract Documents. Barrels shall be watertight. SFPB may stand on pallets up to 4 in. high. Reflectorize the first barrel of the SFPB configuration as specified. Following an impact, an approved reflectorized drum will suffice temporarily as reflectorization for the SFPB. Replace damaged barrels within four hours after notification. Use dry and loose sand in the barrels. Do not use bags of sand. Add an antifreeze agent to the sand in accordance with the manufacturer's recommendations. Have sufficient replacement materials available. Immediately after the SFPB have served the intended purpose, is to remove the installation and restore the site as directed.
104.10 Temporary Crash Cushion Sand Filled Plastic Barrels (Sfpb)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.10.04 Measurement and Payment
Temporary Crash Cushion Sand Filled Plastic Barrels will be measured and paid for at the Contract unit price per barrel for one or more of the items listed below and specified in the Contract Documents.
a.Temporary Crash Cushion Sand Filled Plastic Barrels for Maintenance of Traffic.
b.Replace Temporary Crash Cushion Sand Filled Plastic Barrels for Maintenance of Traffic.
c.Remove and Reset Temporary Crash Cushion Sand Filled Plastic Barrels for Maintenance of Traffic. The payment will be full compensation for excavation, regrading, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.11 Temporary Pavement Markings
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.11 — TEMPORARY PAVEMENT MARKINGS
104.11.01 Description
Furnish, install, and remove temporary pavement markings as specified or as directed by the Engineer. Markings include lines, letters, numbers, arrows, and symbols.
104.11.02 Materials
Pavement Marking Paint 951.01 Black Out Tape 951.02 Removable Pavement Markings 951.08
104.11.03 Construction
104.11.03 01 Quality Assurance/Quality Control. Refer to 549.03. Employ certified
technicians to perform quality control testing. The Engineer will perform quality assurance checks by completing the Nighttime Visibility Evaluations per MSMT 729.
104.11.03 02 Warranty Period. Maintain and correct any defects in the pavement markings for
a period of 180 days from the date of application for tape, thermoplastic or epoxy, and 60 days for paint. Replace defective pavement markings within this warranty period as necessary and as directed at no additional cost to the Administration. When paint is used as a temporary marking for a lane shift/closure that is to be greater than 60 days in length, it shall be reapplied every 60 days.
104.11.03 03 Application and Removal. Apply pavement markings per the manufacturer’s
recommendations and as specified. Apply markings in the same direction as the flow of traffic. Apply the markings to the locations specified or as directed. Pavement markings may be applied to either new or existing paved surfaces. Apply markings to newly paved surfaces before traffic is allowed on the pavement. For milling and paving operations, non tape markings may be used for temporary markings between lifts and temporary raised pavement markings (RPM)s are not required. Use removable tape for temporary markings applied to the final surface. When temperatures are too low to allow the placement of removable tape on the final surface, request a written exception for the use of other type of markings in lieu of removable tape.
104.11 Temporary Pavement Markings
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Completely remove all non-applicable pavement markings within the travel way and adjacent to the travel way for lane shifts as necessary and as directed. Surface Condition. Ensure the pavement surface is clean, dry, and free of all contaminants prior to applying any pavement markings. Remove all residual, loose or poorly applied pavement markings as necessary and as directed. Pavement Marking Removal. Completely remove all removable pavement markings prior to applying permanent markings. Remove any objectionable adhesive residue on stage construction or final surfaces of Portland cement concrete pavements by water blasting or other methods as approved. Do not use open flame to remove any pavement markings or adhesive residue. Remove all pavement markings in a manner that ensures there is no damage to the existing or final surface. Black out Tape. Black out tape may be used for masking existing markings in accordance with MdMUTCD. Use to mask existing marking for temporary shift conditions of less than 14 days and where the traffic will return to the original alignment and markings. For shifts longer than 14 days, remove the existing marking by hydro blasting and replace with new permanent /final markings when original alignment returns. Retroreflectance. The initial retroreflectance readings for temporary pavement markings shall be a minimum of 250 millicandelas/lux/square meter and 150 millicandelas/lux/square meter for white and yellow markings, respectively. The pavement markings will be monitored per MSMT 729 during the Warranty Period.
104.11.04 Measurement and Payment
Payment for Removable Pavement Markings, Removal of Removable Pavement Markings, Pavement Marking Paint, and the Removal of Existing Pavement Markings will be measured and paid for using one or more of the items listed below and as specified. Payment will be full compensation for furnishing, placing, complete removal of lines, letters, numbers, arrows, symbols, and the removal of all residue. Payment will also cover maintenance and replacement of the markings during the 180 day period, and for all material, labor, equipment, tools, and incidentals necessary to complete the work. Removal and replacement of temporary pavement markings required beyond the 180 day period will be measured and paid for at the Contract unit price for the pertinent temporary pavement marking item. Temporary markings replaced during the 180 day period as a result of plowing will be paid for at the Contract unit price for the pertinent temporary marking item, as determined.
a.Pavement Marking Paint-in width specified-per linear foot.
b.Removable Pavement Line Markings-in width specified-per linear foot.
c.Removable Letters, Symbols, Arrows, and Numbers per square foot.
104.11 Temporary Pavement Markings
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
d.Removal of Removable Pavement Marking Lines-any width-per linear foot.
e.Removal of Removable Letters, Symbols, Arrows and Numbers per each.
f.Removal of Existing Pavement Line Markings-any width per linear foot.
g.Removal of Existing Letters, Symbols, Arrows, and Numbers per square foot.
h.Blackout Tape Lines-in width specified-per linear foot.
i.Removal of Blackout Tape Lines-any width-per linear foot.
104.12 Drums for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.12 — DRUMS FOR MAINTENANCE OF TRAFFIC
104.12.01 Description
Furnish, set, reset, maintain, and remove drums for maintenance of traffic.
104.12.02 Materials
Reflectorization 950.03 Plastic Drums QPL Drums may be manufacturer-certified as NCHRP Report 350 and/or MASH 2016 compliant as long as there are no attachments to the device. Drums shall be manufactured of low density polyethylene (LDPE), 36 in. in height, and have a diameter of at least 18 in. The drum shall have four, 6 in. wide horizontal, circumferential, alternating orange and white stripes, with the top stripe being orange. Drums may have one or more flat sides as long as the minimum 18 in. diameter is satisfied. Drums may include recycled plastic content. The drum base may contain up to 100 percent recycled content. Use high performance wide angle white and fluorescent orange sheeting on all drums.
104.12.03 Construction
Use sand-filled bases or bags of sand to keep the drums from moving. Install sandbags on the base of the drum only. Rubber or plastic bases or recycled tires, weighing between 20 lb and 40 lb, may be used as a substitute for sandbags. The Contractor’s name or identification mark may be neatly stenciled at the bottom of the nonreflective portion of the drum in letters no more than 2 in. high. No other markings or wording may be on the vertical side of the drum. Maintain drums in a new or like new condition. Replace drums damaged by traffic within four hours after notification. Damaged drums shall be recycled to the extent possible. The disposition of the damaged drums shall be provided prior to payment for any replacement drums.
104.12 Drums for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.12.04 Measurement and Payment
Drums for Maintenance of Traffic will be measured and paid for once at the Contract unit price per each. The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work. Where drums have been set and damaged by traffic and the Engineer determines that they are not repairable, replacement will be measured and paid for at the Contract unit price. A disposition as specified in 104.12.03 is required prior to payment.
104.13 Barricades for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.13 — BARRICADES FOR MAINTENANCE OF TRAFFIC
104.13.01 Description
Furnish, set, reset, maintain, and remove barricades for maintenance of traffic.
104.13.02 Materials
Reflectorization 950.03 Barricades QPL Barricades shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3.
104.13.03 Construction
Use barricade rails conforming to the MdMUTCD, with a minimum rail length of 5 ft. Use approved reflective sheeting and installation procedures. Replace barricades damaged by traffic within four hours after notification. Mount signs so that no more than half of the top two rails or one third of the barricade is covered. Mount signs on the barricade so that the bottom of the sign is at least 12 in. above the ground or surface. The bottom of rectangular signs shall not be mounted higher than the bottom of the top rail. Do not use aluminum signs.
104.13.04 Measurement and Payment
Barricades will be measured and paid for once at the Contract unit price per each for the pertinent barricade item specified in the Contract Documents. The payment will be full compensation for warning lights (when required), the maintenance and removal of any required warning lights, and for all material, labor, equipment, tools, and incidentals necessary to complete the work. Where barricades have been set and damaged by traffic, and the Engineer determines that they are not repairable, replacement will be measured and paid for at the Contract unit price.
104.14 Cones for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.14 — CONES FOR MAINTENANCE OF TRAFFIC
104.14.01 Description
Furnish, set, reset, maintain, and remove cones for maintenance of traffic.
104.14.02 Materials
Reflectorization 950.03 Cones QPL Cones may be manufacturer-certified as NCHRP Report 350 and/or MASH 2016 compliant as long as there are no attachments to the device. All cones shall meet MdMUTCD and be new or like new condition. All cones shall be orange in color. Cones shall be at least 28 in. high, 10 in. diameter at the inside of the base, and reflectorized with two white retroreflective stripes. The top stripe shall be 6 in. wide and located 3 in. to 4 in. from the top of the cone. The second stripe shall be 4 in. wide and located 2 in. below the top band. Tall-Weighted Cones. When specified, tall-weighted cones shall be at least 42 in. high and 7 in. diameter at the inside of the base. Tall-weighted cones shall be manufactured of low density polyethylene (LDPE) and have four high performance wide angle white and orange retroreflective stripes. The stripes shall be horizontal, circumferential and 6 in. wide. Alternate stripe colors with the top stripe being orange. Any non-retroreflective spaces between the orange and white stripes shall not exceed 1/2 in.
104.14.03 Construction
The Contractor’s name or identification mark may be neatly stenciled at the bottom of the cone in a maximum of 2 in. high letters. Place no other markings or writings on the vertical area of the cone. Turn the cone so that the Contractor’s name or identification mark faces away from traffic. Equip all cones with approved weights or anchor collars (15 lb maximum) as needed to maintain an upright position. Anchor collars shall fit to the base of the cone. For tall-weighted cones use anchor collars weighing 10 lb to 30 lb. Replace cones damaged by traffic within four hours or as directed after being notified.
104.14 Cones for Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.14.04 Measurement and Payment
Cones for maintenance of traffic and cones that have to be replaced will not be measured but the cost will be incidental to the Contract price for Maintenance of Traffic.
104.15 Flagger
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.15 — FLAGGER
104.15.01 Description
Furnish flaggers when specified or directed. Flaggers shall have completed an Administration approved flagger training course within the last four years. The failure of any flagger to perform the required duties will be grounds for replacement. Flaggers shall utilize two-way radios, field telephones, or pilot vehicles when not within sight distance of each other, or when directed.
104.15.02 Materials
Reflective sheeting on the STOP/SLOW paddle 950.03 Paddles shall be 24 in. x 24 in. with letters at least 8 in. high and mounted at least 5 ft above the ground.
104.15.03 Construction
Flagging shall conform to MdMUTCD. All outfits and equipment (STOP/SLOW paddles, pilot cars or other vehicles, air horns or bullhorns, field telephones, two-way radios, site illumination, etc.) will be subject to approval. Use STOP/SLOW paddles unless otherwise permitted.
104.15.04 Measurement and Payment
Flagger will not be measured but the cost will be incidental to the Contract price for Maintenance of Traffic. When an item for Flagger is included in the Contract Documents, Flagger will be measured and paid for at the Contract unit price per hour. The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.16 Modification of Existing Signs
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.16 — MODIFICATION OF EXISTING SIGNS
104.16.01 Description
Relocate, remove, cover, modify copy, reinstall, or change existing highway signs relating to the construction activity. This work is in addition to the temporary traffic signs specified in 104.08.
104.16.02 Material
Sign Panel Supports and Hardware 909.07, 921.05, 921.06, 950.04, A123, A153, and A709 Reflective and Non-reflective Sheeting 950.03 Sign Materials 950.08 Use an approved opaque sign covering material.
104.16.03 Construction
Modify existing signs as specified.
104.16.04 Measurement and Payment
Modification of existing signs will be measured and paid for using one or more of the items listed below and specified in the contract documents. The payment will be full compensation for all excavation, backfill, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
a.Relocate Wood Sign Supports per each support.
b.Sign Modifications to Overhead Sign Structures per square foot.
c.Relocate Sign per square foot.
d.Remove Sign per square foot.
e.Modify Copy per each character.
f.Install or Remove Shield per each.
104.16 Modification of Existing Signs
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
g.Cover Sign per square foot.
h.Relocate Sign Luminaire per each.
104.17 Temporary Movable Type Concrete Traffic Barrier (Mctb)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.17 — TEMPORARY MOVABLE TYPE CONCRETE TRAFFIC BARRIER (MCTB)
104.17.01 Description
Furnish, place, assemble, maintain, move, and remove and dispose of movable interlocking type concrete traffic barrier. Movable barrier systems shall consist of individual units that remain connected for the total length when being moved in one continuous operation.
104.17.02 Material
Precast Movable Concrete Barrier and Transfer Device QPL Reflective Barrier Markers QPL MCTB shall conform to NCHRP Report 350 and/or MASH 2016 criteria for Test Level 3.
104.17.03 Construction
Perform all transfer shifts using the transfer device. The transfer device shall be capable of moving and transferring the barrier as required, and of operating on the curve and grades specified. Ensure that the device does not extend into traffic. The Engineer will inspect the movable barrier upon delivery and throughout the life of the project. Replace any damaged or defective units as directed. Install reflective barrier markers as specified. Maintain the barrier and reflective barrier markers in a like new condition. Perform all maintenance operations for the transfer device. Have sufficient spare parts and personnel available to ensure that the required lane configurations are in place at the required times. Failure to move the MCTB at the proper time will be cause for penalty under TC-4.02.
104.17.04 Measurement and Payment
The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work.
a.The initial installation of the Temporary Movable Type Concrete Traffic Barrier will be measured and paid for at the Contract unit price per linear foot measured in place from end to end.
104.17 Temporary Movable Type Concrete Traffic Barrier (Mctb)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
b.Transfer shifts of the barrier will be measured and paid for at the Contract unit price per linear foot for the Transfer Shift of Movable Type Concrete Barrier item. The measurement will be end to end of the barrier actually shifted. The Contract unit price will apply to each shift.
c.Replacing sections of the barrier that have been damaged by vehicular traffic while in place will be measured and paid for at the Contract unit price per each for the Replacement Sections for Movable Type Concrete Barrier item. Replacement of sections damaged by the Contractor’s operations shall be at no additional cost to the Administration.
d.Resetting the barrier will be measured and paid for at the Contract unit price per linear foot for the Reset Movable Type Concrete Barrier item. The payment will also include removal from its original placement and transporting and resetting it in its new temporary location.
e.Reflective barrier markers will be measured and paid for as specified in 104.04.04(b).
f.End treatments will be measured and paid for under the pertinent item specified in the Contract Documents.
104.18 Traffic Manager (Tm)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.18 — TRAFFIC MANAGER (TM)
104.18.01 Description
Provide a Traffic Manager (TM).
104.18.02 Materials
Not applicable.
104.18.03 Construction
Submit the TM’s name for approval at least 10 days prior to commencing any work on the project. Provide proof that the TM has completed an Administration approved Temporary Traffic Control training course within the last four years. A change in the appointment of any TM throughout the duration of the Contract will require a written submittal for approval. Any failure of the TM to perform the required duties will be grounds for replacement. The TM shall be available at all times and be on site within 1/2 hour during periods of active work in the work zone. The TM shall do the following:
a.Implement the Traffic Control Plan (TCP), maintain an up-to-date TCP, and provide a copy to the Engineer following any changes.
b.Closely coordinate the operations with the Engineer and supervise the maintenance of traffic on the project, including those involving subcontractors.
c.Make on-site inspections of the area affected by the work on a regular basis including Saturdays, Sundays, and holidays, and be available for consultation at all times. When the TCP is in place, make daily inspections during hours of operations and at least one night inspection per week. Perform additional inspections as directed.
d.During holiday periods, in addition to the monitoring of the maintenance of traffic, conduct a surveillance of any area affected by the Contract work.
e.Maintain a daily log of the inspections and include the date, time, hours worked, condition of maintenance of traffic, and any corrective action taken. Furnish a copy of the daily log to the Engineer by the following day.
104.18 Traffic Manager (Tm)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
f.Provide coordination between adjacent work zone operations to ensure that inappropriate or conflicting messages or devices are not displayed to traffic.
g.Immediately, notify the Engineer of any accident or incident within the area affected by the Contract.
h.Make inspections during and immediately after adverse weather conditions to ensure that the traffic control devices are clean, undamaged, and in the correct position.
104.18.04 Measurement and Payment
The Traffic Manager will not be measured but the cost will be incidental to the Contract price for Maintenance of Traffic.
104.19 Portable Variable Message Signs (Pvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.19 — PORTABLE VARIABLE MESSAGE SIGNS (PVMS)
104.19.01 Description
Furnish, install and relocate portable, self-contained, trailer mounted variable message signs.
104.19.02 Materials
PVMS QPL All materials shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities normally found along the edge of the traveled roadway. Construction, materials, and operation shall meet NFPA, UL, and NEC. Ensure that sign messages are visible and legible for a distance of 900 ft from any point along the traveled approach roadway at all times. The PVMS shall be equipped with a sighting device to provide alignment for maximum visibility.
104.19.03 Construction
104.19.03 01 Equipment.
Trailer. In accordance with Maryland Motor Vehicle Law. Structural Support. The structural support framework shall allow the system to be assembled into a unit and be mounted on the trailer and shall provide the support mechanism between the sign panel assembly, the power supply, and the controller. The framework shall provide sufficient support to prevent damage to any unit component when the sign is in down and locked position during normal highway travel. The deployed structure shall supply adequate support to allow complete sign operation, including raising and lowering of the sign panel, during sustained wind speeds of 85 mph. The display windows shall be made of impact-resistant clear Lexan or as approved. Sign Panel. Not to exceed 144 in. length, 90 in. height, 12 in. depth.
104.19 Portable Variable Message Signs (Pvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Display.
a.Capable of displaying three lines of text.
b.Each line of text shall be constructed using either a discrete matrix or a full matrix display.
c.Capable of displaying eight characters per line.
d.The character height shall be at least 18 in.
e.If discrete matrix display is used, each character shall be displayed using a 5 x 7 array with at least eight array modules per line. A 4-1/4 in. to 7 in. space shall exist between each display line with no glare reflection.
f.If full matrix display is used, the sign shall have at least 25 rows and 45 columns of disks. Each display line shall have at least 7 rows and 45 columns of disks and a 4- 1/4 in. to 7 in. space between each display line with no glare reflection. Flip Disk Mechanism.
a.Be electromagnetically activated, with a service life of at least 200 million operations.
b.Have a reflective surface that will maintain color intensity for at least three years.
c.Be circular or rectangular, with a visible surface area between 3-3/4 in2. and 4-1/4 in2. LED Illumination. LED illumination for each matrix element shall:
a.Meet ITE specification for amber color.
b.Utilize AlInGaP substrate.
c.Each LED shall produce at least a 1 candela output on center at 25 mA drive current.
d.Each matrix element shall have at least two LED's located within the perimeter of the flipping disk.
e.Provide full illumination within at least a 24 degree cone perpendicular to the sign face.
f.Have an operating temperature range of -40 F to 160 F.
104.19 Portable Variable Message Signs (Pvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS PVMS UNIT. Lift Mechanism.
a.Electric or electrically assisted hydraulic mechanism capable of raising and lowering the sign panel.
b.Capable of being raised or lowered manually.
c.Furnished with a stainless steel safety bolt to prevent the sign panel from lowering once in the raised position. A self-locking mechanism shall be incorporated into the safety bolt to prevent it from being inadvertently dislodged.
d.Designed to allow the raised sign panel to rotate 360 degrees about the vertical axis.
1.Allow rotation clockwise and counter-clockwise.
2.A mechanism shall be provided to lock the sign panel in place, at any position. Electrical Connections and Gauges.
a.All wiring from power sources to PVMS equipment shall use locking cable connectors.
b.Volt and amp gauges shall be provided for both AC and DC.
c.Standard negative ground system shall be tied to the sign chassis.
d.Lightning protection shall be supplied to the load side of the sign system's distributed power lines to withstand multiple surges in excess of 600 volts. Power Supply. Either a solar powered electrical system, or existing commercial electrical service. Solar Powered Electrical System. Battery power system and solar array panels capable of displaying a two page message for 21 consecutive days without auxiliary charge. Sign Controller.
a.Capable of driving the matrix display panel operating over a -50 F to 150 F range and in a 20 percent to 100 percent noncondensing humidity range.
b.Accommodate 100 preprogrammed, user-defined messages.
c.Capable of displaying three sequenced messages. On/Off time for each message in a sequence shall be user adjustable within a range of 0 seconds to 5 seconds.
104.19 Portable Variable Message Signs (Pvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
d.Designed for fail-safe prevention of improper information display in the case of a system malfunction.
e.Cause a user defined default message to be displayed in case of failure of the PVMS unit when flip disk mechanism is used.
f.Have the capability of retrieving all messages stored in temporary memory.
1.Temporary memory shall be nonvolatile.
2.All messages and programs shall remain resident in the controller's memory in the event of a power failure.
3.Have an RS-232 port to facilitate connection of an external communication device.
g.Capable of automatic system recovery after power outages to the central controller without operator intervention, including the ability to maintain an up-to-date status on a remote unit if sign is operated from a remote location.
h.Monitor and display the battery output voltage and solar array activities (charging/discharging) and blank the sign when the battery output voltage drops below the manufacturer's recommended output level.
i.Capable of monitoring and displaying the status of the photocell and adjusting the sign illumination to match the ambient light conditions. The controller shall have at least nine levels of dimming from 10 percent to 100 percent brightness.
j.Contained in a secure weatherproof cabinet located on the controller housing and insulated to protect against excessive vibration, temperature or tampering.
1.Equipped with a lockable door latch and an interior cabinet dome light.
2.Provided with a keyboard storage location inside the cabinet.
3.Security locks shall include those installed by the manufacturer and an additional hardened hasp/lock combination with a user changeable combination. This hasp/lock setup shall be installed in a manner to maximize its effectiveness in stopping unauthorized access to the sign controls. For control box surfaces not compatible with the hasp/lock setup, other supplemental high security locking devices may be approved by the Engineer. Security.
a.Lock all trailer control cabinets when not attended by Administration employee or contractors, whether being stored, in transport, or deployed and activated.
104.19 Portable Variable Message Signs (Pvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
b.Do not store or maintain any passwords on the PVMS.
c.Remove any password attached or inscribed on the PVMS trailer or equipment.
d.Change the password when it is no longer secure, or every 6 months, whichever comes first.
e.Some older model PVMS may not have a changeable password, so extra measures shall be taken to hide the password.
f.Do not leave Owner/Instruction manuals in the trailer control cabinets. Manuals should be copied and made available to the personnel responsible for deploying the PVMS Signs.
g.When equipped with a detachable keyboard, remove it from the trailer and secure in the transport vehicle, field office, or at the respective shop.
h.Failure to comply with these security standards or any subsequent PVMS tampering incidents will be cause for penalty under TC-4.02.
i.Construction and District Inspectors will ensure contractor compliance. Character Set Software.
a.Have all of the standard ASCII characters and symbols.
b.Provide left and right arrows.
c.Have all alphanumeric entries performed with a keyboard or keypad that causes the same character to be displayed on the matrix. Arrow symbols shall be generated via a cursor pad on the keyboard or keypad.
d.Have messages default to self-centering display with the ability to left or right justify a display when full matrix is used.
104.19.03 02 Set up and operate the PVMS on the project site 24 hours in advance of actual use.
Ensure that each unit is functioning properly and approved. Locate the PVMS as specified. Aim the PVMS at approaching traffic in accordance with the 900 ft minimum visibility and legibility requirement. Ensure that the PVMS is level and that the sign face is not obscured by highway alignment or glare from either sunlight or vehicle headlights.
104.19 Portable Variable Message Signs (Pvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.19.04 Measurement and Payment
Portable Variable Message Sign will be measured and paid for at the Contract price per unit day. A unit day will consist of any approved usage within a work shift, regardless of start time or whether the shift runs into another calendar day. Each portable variable message sign will be paid for only once per unit day, regardless of how many times it may be relocated. When a portable variable message sign is used for part of a day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of a portable variable message sign, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for the electrical power and hook up, setup and maintenance of computer programs, changing messages, and for all material, labor, equipment, tools and incidentals necessary to complete the work.
104.20 Temporary Orange Construction Fence
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.20 — TEMPORARY ORANGE CONSTRUCTION FENCE
104.20.01 Description
Furnish, install, and maintain new or like new temporary orange mesh construction fence. This fence is not to be used as a safety barrier.
104.20.02 Materials
Precast Concrete Blocks 903.05 Tie Wire, Tension Wires, Tension Wire Clips and Hardware 914.02 Orange Mesh Fencing As approved Fence posts shall be 4 ft high, 1.90 in. diameter round posts; or 5-1/2 ft high, 2 in. steel U channel posts, as specified herein. Submit samples of the fence fabric, fence posts, movable precast concrete blocks, tie wire, tension wires, and other miscellaneous hardware for approval.
104.20.03 Construction
Temporary orange construction fence shall be at least 4 ft high and with a maximum post spacing of 8 ft. When installed on a paved surface, support the fence by inserting the round post into a precast concrete block having a round hole through the center of the block. When installed in unpaved areas, use steel U channel fence posts driven 1-1/2 ft into the ground. Installation of the fence in any other manner will require approval. Secure the fabric to the posts by wrapping a tie wire around the horizontal fence strands and the posts. Install a top tension wire to prevent sagging. When installed on paved surfaces, the Engineer will determine if a bottom tension wire is required. Remove the fence when the Engineer determines that the fence is no longer required. The removed fence is the property of the Contractor. Damaged Construction Fence. Repair or replace damaged construction fence within four hours after notification.
104.20 Temporary Orange Construction Fence
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.20.04 Measurement and Payment
The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work. Temporary Orange Construction Fence will be measured and paid for at the Contract unit price per linear foot for the actual number of linear feet measured to the centers of end posts. Remove and Reset Temporary Orange Construction Fence will be measured and paid for at the Contract unit price per linear foot.
104.22 Automated Flagger Assistance Device (Afad)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.22 — AUTOMATED FLAGGER ASSISTANCE DEVICE (AFAD)
104.22.01 Description
An automated flagger assistance device (AFAD) is designed for remote operation by a certified flagger. AFADs shall only be used in situations where there is only one lane of approaching traffic in the direction to be controlled. The AFAD shall be either Type I ‘STOP/SLOW’ Sign system or Type II ‘Red/Yellow’ Lens system. Furnish, install, and maintain a portable, self-contained, AFAD for temporary traffic control as specified in the Contract Documents or as directed. The AFAD shall be crashworthy as specified in Section 104. Furnish certified flagger(s) per 104.15.01 to operate the AFAD(s). Install AFAD related signs and channelizing devices as specified in the Book of Standards for Highways and Incidental Structures.
104.22.02 Materials
AFAD QPL Cones for Maintenance of Traffic 104.14.02 Reflectorization 950.03 Sign Material 950.08 The AFAD shall be capable of being operated from the controller cabinet mounted on the unit. The unit shall have the ability for manual override in case of remote failure.
104.22.02 01 General System Requirements.
a.Gate Arm. The AFAD shall include a gate arm that is at least 6 ft long and the end of the arm shall reach at least to the center of the lane being controlled. The gate arm shall not extend in the opposite lane. The arm shall have vertical alternating red and white stripes on both sides at 16 in. intervals measured horizontally. The arm shall be made of lightweight rigid material. A retroreflective red or retroreflective fluorescent orange/red flag (minimum of 18 in. square) shall be attached on the end of the roadside end.
b.Remote Control. The AFAD shall be equipped with a weatherproof handheld remote control that is capable of displaying the status of the AFAD display. The remote control
104.22 Automated Flagger Assistance Device (Afad)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS shall be programmable to control either one unit or two units and be able to control units over the required range.
c.Power Supply. The AFAD shall be able to operate from a solar powered electrical system and consist of battery power and solar array panels.
d.Trailer. The trailer shall be painted orange and shall comply with Maryland Motor Vehicle Law.
104.22.02 02 Type I ‘STOP/SLOW’ Sign AFAD Requirements.
a.‘STOP/SLOW’ Sign. Type I AFAD unit shall include a ‘STOP/SLOW’ sign that alternately displays the STOP (R1-1) face and the SLOW (W20-8) face of a ‘Stop/Slow’ paddle. The ‘STOP/SLOW’ sign shall have an octagonal shape and shall be fabricated of rigid material. The size of the ‘STOP/SLOW’ sign shall be at least 30 in. x 30 in. with letters at least 8 in. high. The background of the STOP face shall be red with white letters and a border. The slow face shall be diamond shaped with fluorescent orange background and black letters and a border. Both faces of the ‘STOP/SLOW’ sign shall be reflectorized as specified in 950.03. The bottom of the ‘STOP/SLOW’ sign shall be mounted a minimum of 7 ft above the pavement.
b.AFAD Related Signs. Type I AFAD shall be supplemented by stationary sign(s) with one of the following options:
1.Separate ‘WAIT ON STOP’ (R1-7) and ‘GO ON SLOW’ (R1-8) signs attached side by side below the STOP/SLOW sign. Each sign shall be 24 in. x 30 in. The background of the sign shall be white with black letters and border, and the sign face shall be reflectorized as specified in 950.03.
2.One combined sign with combined message ‘WAIT ON STOP GO ON SLOW’ attached below the ‘STOP/SLOW’ sign. The sign shall be 36 in. x 36 in. The background of the sign shall be white with black letters and border, and the sign face shall be reflectorized as specified in 950.03. The signs (‘WAIT ON STOP’, ‘GO ON SLOW’, or the combined ‘WAIT ON STOP GO ON SLOW’) shall be positioned on the same support structure as the AFAD such that they are in the same direct line of view of approaching traffic as the sign faces of the AFAD.
c.Conspicuity Devices. The Type I AFAD shall be supplemented with active conspicuity devices. Each AFAD unit shall include a red Stop Beacon mounted a maximum of 24 in. above the ‘STOP/SLOW’ face and yellow warning lights mounted to the side or above the ‘STOP/SLOW’ face. The Stop Beacon shall consist of a 12 in. red LED signal head with a visor and shall steadily illuminate in circular red only during the STOP sign display. The Warning Lights shall illuminate in flashing yellow during the SLOW sign display.
104.22 Automated Flagger Assistance Device (Afad)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.22.02 03 Type II ‘Red/Yellow’ Lens AFAD Requirements.
a.Signal Head. Type II AFAD unit shall have a signal head with one set of circular red and circular yellow lenses. The circular red shall be placed on top and the circular yellow below. The signal head shall be as specified in 950.15 and shall meet the physical display and operational requirements of conventional traffic signals according to Part IV of the MdMUTCD. The signal head shall be aluminum or polycarbonate and have two, 12 in. LED indications. The signal head shall be equipped with a visors which extend beyond the signal head a minimum of 10 in. All signal housings shall be black or yellow. The signal head shall have the ability to accommodate a back plate. The lower signal head shall be mounted at a minimum height of 7 ft measured from the bottom of the yellow indication to the road surface.
b.AFAD Related Sign. Type II AFAD shall be supplemented by stationary 24 in. x 36 in. ‘STOP HERE ON RED’ sign (R10-6 or R10-6a). The sign shall have a white background with black letters and border, and the sign face shall be reflectorized as specified in 950.03. The sign shall be installed per MD 104.01-17 on the right-hand side in advance of the unit at the point at which drivers are expected to stop when the steady circular red lens is illuminated.
104.22.03 Construction
104.22.03 01 AFAD. Place the AFAD unit as shown in the Contract Documents or as directed,
with all signs and traffic control devices visible to the driver of the initial approaching vehicle. Install advance warning signs and install cones along the road center line and around the AFAD according to the Book of Standards and the Contract Documents. Ensure that the AFAD is operational for the duration of the lane closure. The AFAD shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities normally found along the edge of the traveled roadway. Construction, materials, and operation shall be according to NFPA, ULI, and NEC. When used at night, the AFAD location shall be adequately illuminated.
104.22.03 02 Operation.
a.Type I ‘STOP/SLOW’ Sign AFAD. SLOW to STOP transition. The red Stop Beacon shall enter a ‘flashing mode’ approximately 2 seconds before transitioning from the SLOW face to the STOP face. When the AFAD unit displays the STOP face, the red Stop Beacon shall illuminate in steady red, and the gate arm shall begin descent to the down position 2 seconds after the beacon has displayed the solid red light. STOP to SLOW transition. The gate arm shall begin to ascend to the upright position as the face changes from STOP to SLOW and the red stop light shall cease to illuminate. The yellow beacon(s) shall enter flashing mode.
104.22 Automated Flagger Assistance Device (Afad)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
b.Type II ‘Red/Yellow’ Lens AFAD. To stop road users. The AFAD shall display a steadily illuminated circular red lens and with the gate arm in the down position. To transition to circular red, the flashing circular yellow lens shall enter into 3 seconds to 5 seconds steady circular yellow illumination phase prior to transitioning to the steadily illuminated circular red condition. The gate arm shall begin its descent 3 seconds to 5 seconds after the circular red lens is illuminated. To permit road users to proceed. The AFAD shall display a flashing circular yellow lens and the gate arm shall be in the upright position. To transition to circular yellow condition, the gate arm shall begin its ascent to an upright position simultaneously with the start of the illumination of the flashing circular yellow lens.
104.22.03 03 Flaggers. Provide certified flaggers on-site and use one of the following methods
to operate the AFAD(s):
a.Method 1 – Place an AFAD at each end of the work area.
b.Method 2 – Place an AFAD at one end and place a flagger at the opposite end. The flagger operating the AFAD shall be able to view the device and the approaching traffic during the operation.
104.22.03 04 Cones. Install cones according to the MdMUTCD, the Book of Standards, the
Contract Documents, and the following:
a.Install a minimum of 11 cones spaced at 20 ft maximum along the center line on the approach to the AFAD.
b.Use a minimum of 7 cones to form the shoulder taper to delineate the AFAD.
104.22.04 Measurement and Payment
104.22.04 01 Automated Flagger Assistance Device will be measured and paid for at the Contract
price per unit day per each Automated Flagger Assistance Device. A unit day will consist of any approved usage within a work shift, regardless of start time or whether the shift runs into another calendar day. Each Automated Flagger Assistance Device will be paid for only once per unit day, regardless of how many times it may be relocated. When an Automated Flagger Assistance Device is used for part of a day, it will be measured and paid for as a unit day. The payment will be full compensation for the Automated Flagger Assistance Device, and for all material, labor, equipment, tools, and incidentals necessary to setup and operate the Automated Flagger Assistance Device at the site as required and at any relocated site as specified or as directed. When operations require
104.22 Automated Flagger Assistance Device (Afad)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS continuous 24 hour use of an automated flagger assistance device, the unit day will be measured as 24 hour periods from start to finish.
104.22.04 02 Certified flaggers to operate the Automated Flagger Assistance Device will be
measured and paid for at the Contract unit price per hour as specified in 104.15.04.
104.22.04 03 Cones to delineate the center line in the approach to the Automated Flagger
Assistance Device and form the taper in front of the Automated Flagger Assistance Device will not be measured but the cost will be incidental to the Contract unit price for Automated Flagger Assistance Device.
104.22.04 04 Automated Flagger Assistance Device related signs (R1-7, R1-8, R10-6, R10-6a)
will not be measured but the cost will be incidental to the Contract unit price for Automated Flagger Assistance Device.
104.23 Protection Vehicle (Pv)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.23 — PROTECTION VEHICLE (PV)
104.23.01 Description
Furnish a PV as required. The PV shall consist of a work vehicle with approved flashing lights as required by the standard TCP’s and either:
a.A truck-mounted attenuator (TMA) with support structure designed for mounting the system to the work vehicle, or
b.A trailer truck-mounted attenuator (TTMA) designed for attaching the system to the work vehicle by a pintle hook. Provide an arrow panel (arrow mode for multilane roadways and caution mode on two-lane, two- way roadways) in accordance with 104.07.03. The arrow panel shall be integral to either the work vehicle or the TMA/TTMA. No part of the TMA/TTMA shall be designed to intrude under the support vehicle during impact or require a safety clearance under the support vehicle that extends forward of the rear axle. General. The ballast of the work vehicle shall meet the manufacturer’s specification for the TMA/TTMA and be firmly secured to prevent movement during an impact. All exposed steel on the attenuator shall be primed and painted yellow. The undercarriage and support frame may be primed and painted black. All welding shall be performed by or under the direct supervision of a certified welder. The rear facing surface of the TMA/TTMA shall have an inverted "V" chevron pattern formed by alternating 4 in. wide black and yellow stripes as shown in Standard No. MD 104.01-19C. The sides of the TMA/TTMA shall have a border of 4 in. red and white reflective tape as shown on Standard No. MD 104.01-18A. The TMA/TTMA shall have a standard lighting system including brake lights, tail lights, turn signals, and ICC bar lights. All wiring shall be protected and adequately supported. The TTMA trailer shall conform to Maryland Motor Vehicle Law governing trailers.
104.23 Protection Vehicle (Pv)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Impact Performance. TMA/TTMAs manufactured prior to January 1, 2005, shall have passed NCHRP Report 350 Tests 50 and 51 Level 3. TMA/TTMAs manufactured after January 1, 2005, shall have passed NCHRP Report 350 Tests 50, 51, 52, and 53 Level 3. Dimensions.
a.Road clearance for the TMA/TTMA shall be 12 in. ± 1 in. or as specified by the manufacturer.
b.Total weight of the TMA, exclusive of the work vehicle, shall not exceed 2100 lb unless it is trailer-mounted. Durability. The manufacturer shall ensure that travel vibration, in either a vertical (for TMA) or horizontal position, will not affect the performance of the work vehicle or the TMA/TTMA. Certifications. Provide certification that the TMA/TTMA is in good working order, has not been damaged, conforms to the requirements of the manufacturer’s specifications (model number, roll ahead distance, truck weight, etc.), and includes the date of manufacture. The manufacturer shall certify that moisture penetration will not impede the energy impact absorption properties or add significantly to the weight of the TMA/TTMA. Tilting. An electrically powered tilt system shall be incorporated to facilitate the tilting of the TMA cartridge to a 90 degree position from horizontal. The unit shall have a locking device to secure the TMA system in the vertical position. The completed tilt system shall be factory assembled.
104.23.02 Materials
The size of the work vehicle and the method of attachment shall be as specified in the TMA/TTMA manufacturer's specifications, and as tested according to NCHRP Report 350 and/or MASH 2016 at Test Level 3. The gross vehicle weight rating (GVWR) of the work vehicle shall be a minimum of 14 000 lb, and any fuel tank or container of hazardous materials shall be at least 10 1/2 ft from the rear of the work vehicle.
104.23.03 Construction
Not applicable.
104.23.04 Measurement and Payment
Protection Vehicle will be measured and paid for at the Contract price per unit day. A unit day will consist of any approved usage within a work shift, regardless of start time or whether the shift runs into another calendar day. Each protection vehicle will be paid for only once per unit day, regardless of how many times it may be relocated. When a protection vehicle is used for part of a
104.23 Protection Vehicle (Pv)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of a protection vehicle, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for the complete protection vehicle, including the truck mounted attenuator/trailer truck mounted attenuator and arrow panel, licensed work vehicle operator, unless a separate pay item has been established for the Operator, relocating the protection vehicle, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.24 Workers Present Trailer (Wpt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.24 — WORKERS PRESENT TRAILER (WPT)
104.24.01 Description
A Workers Present Trailer (WPT) is designed to enhance motorists’ situational awareness when entering a work zone where workers are present. When activated, a WPT will display alternating flashing YELLOW signal heads (beacons). Furnish, install, operate, and relocate a portable, self-contained, WPT with flashing beacons and ‘Work Zone - Fines Higher When Flashing’ (R2-6(5)) sign as specified or as directed.
104.24.02 Materials
Each WPT unit shall include the trailer, structural support system, sign panel assembly, lift mechanism, power supplies, trailer mounted controller, flashing beacons, communications, and ancillary equipment. All materials for the WPT shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities typically found along the edge of a traveled roadway. Construction, materials, and operation shall be in accordance with NFPA, UL, and NEC. The WPT trailer shall be painted orange and shall comply with Maryland Motor Vehicle Law.
104.24.02 01 Equipment.
a.Trailer. In accordance with Maryland Motor Vehicle Law governing trailers.
b.Structural Support. Refer to 104.19.
c.Sign Panel.
1.‘Work Zone - Fines Higher When Flashing’ (R2-6(5)) sign shall be attached to the WPT. The sign dimension shall be 48 in. wide by 60 in. high. The top portion of the sign face shall have a fluorescent orange background with black letters and border, and the lower portion of the sign face shall have a white background with black letters and border, and the sign face shall be Workers Present Trailer QPL Reflectorization 950.03 Sign Material 950.08 Traffic Signal Heads 950.15
104.24 Workers Present Trailer (Wpt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS reflectorized as specified in 950.03. The sign shall be mounted to the WPT at a minimum mounting height of 5 ft measured from the bottom of the sign to the road surface and in a manner that allows for easy removal when necessary for maintenance. The minimum mounting height shall be increased to 7 ft if the trailer is placed in business, commercial, or residential areas.
d.Lift Mechanism.
1.The lift mechanism shall be installed such that the sign panel can be raised and lowered manually.
2.A corrosion resistant safety bolt or pin shall be provided to prevent the sign panel from lowering once in the raised position. A self-locking mechanism shall be incorporated into the safety bolt or pin to prevent it from being inadvertently dislodged.
e.Electrical Connections and Gauges.
1.All wiring from power sources to WPT equipment shall use locking cable connectors.
2.Volt and amp gauges shall be provided for DC.
3.Standard negative ground system shall be tied to the sign chassis.
f.Power Supply. The WPT shall operate from a solar powered electrical system consisting of battery power and solar array panels. The electrical system shall be capable of supporting continuous operation of the system for 21 consecutive days without an auxiliary charge and be capable of being charged by a generator or other commercially available power source in case of malfunction, damage, or failure of the primary solar powered electrical system.
g.Controller Requirements. The controller shall be capable of the following.
1.Being controlled locally at the unit and remotely via a remote on/off via cellular connection and an internet accessible interface.
2.Driving a flashing beacon operating over a -30 F to 125 F range and in a 20 percent to 95 percent noncondensing humidity range.
3.Monitoring and displaying the battery output voltage and solar array actives (charging and discharging).
4.Being contained in a sheet metal or high-density polyethylene (HDPE), weatherproof cabinet located on the controller housing and insulated to protect against excessive vibration and temperature. The cabinet shall be equipped
104.24 Workers Present Trailer (Wpt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS with a lockable door with hasp/lock setup installed in a manner to maximize its effectiveness in stopping unauthorized access to the beacon controls. Other physical locking devices may be approved by the Engineer.
h.Yellow Lens Requirements.
1.The WPT unit shall have two 12 in. circular signal heads mounted on the front side of the WPT facing approaching traffic. Each signal head shall have one circular yellow lens. The indications shall illuminate in an alternating flashing pattern when activated and shall be mounted in one of the following ways:
i.Mounted Top/Bottom with one signal head placed above and below the R2- 6(5) sign. A signal head mounted at the bottom of the R2-6(5) sign shall be mounted a minimum height of 5 ft measured from the bottom of the signal head to the road surface. (ii) Mounted Top Only with both signal heads placed at the same height and symmetrically centered above the R2-6(5) sign. (iii) Mounted Left and Right Side with both signal heads placed at the same height on the left and right side of the R2-6(5) sign. Signal heads mounted on the left and right side of the sign shall be mounted at a minimum height of 7 ft measured from the bottom of the signal heads to the road surface.
2.Signal heads shall be as specified in 950.15 and shall meet the physical display and operational requirements of flashing beacons according to Part IV of the Maryland Manual on Uniform Traffic Control Devices (MdMUTCD). Each signal head shall be aluminum or polycarbonate having one 12 in. YELLOW LED indication. The signal head shall be equipped with a visor which extends beyond the signal head a minimum of 10 in. All signal housings shall be black or yellow.
i.Beacon Status Indicator. WPT shall be supplemented with one 4 in. minimum diameter yellow LED warning light mounted on the back of the WPT. The warning light shall be mounted a minimum of 7 ft measured from the bottom of the warning light to the road surface and shall not be visible to motorists approaching the WPT from the front. The warning light shall illuminate in a flashing pattern when the front-facing signal heads are activated, and shall not illuminate when the front-facing signal heads are deactivated. The warning light will enable workers downstream in the work zone to confirm the WPT system is operational.
j.Communications. The WPT systems shall be equipped with a vendor-provided cellular and modem communication system.
k.Monitoring System Requirements.
104.24 Workers Present Trailer (Wpt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
1.GPS shall be used to monitor trailer location.
2.Be capable of reporting sign panel orientation.
3.Be capable of reporting the current time and date, flashing beacon operating status, battery voltage, available solar power, trailer location in latitude/longitude, sign panel heading, and system malfunction.
4.Be capable of configuring customizable alerts and immediately communicating alerts and device malfunction via electronic notification (e.g. text or email) to responsible individuals.
5.Be capable of providing real-time information automatically to the Administration or its designee with connected capabilities. The connected capabilities shall allow the WPT to transfer reportable data over a cloud network without human interaction using communication technology. The WPT shall provide a cellular network router used for remote communications and real-time GPS tracking to inform remote system users of the reportable data.
6.Provide electronic communication between the WPT, WPT central server, and the Administration or its designee following the Administration’s protocol.
l.Default Requirements. WPT systems shall revert to a non-flashing mode upon system malfunction. Upon system malfunction, the WPT system shall immediately contact a minimum of three responsible individuals via the remote monitoring system described in the Operating System Requirements section. The WPT system repairs shall be the responsibility of the contractor and rendered in a manner that will return the WPT to full operation condition in the most expeditious manner.
m.Operating System Requirements.
1.The flashing beacon controller shall be enclosed in a cabinet mounted on each trailer.
2.Be controlled with a Graphical User Interface for programming on-site.
3.A web interface shall be used for remote programming, monitoring, and reporting.
4.Be capable of scheduling unique and reoccurring schedules.
5.Be capable of tracking and recording accurate date/time, location, sign panel orientation, WPT identification number, and project number.
104.24 Workers Present Trailer (Wpt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
6.The operating system shall be equipped with diagnostic capabilities in the event of a system malfunction.
7.The system shall have the capability of identifying the malfunction in a manner that will expedite the return to full operational mode.
n.Logging/Reporting. Flashing beacons on the WPT shall be activated when workers are present in the work zone and deactivated when workers are not present.
1.The operating system shall have an integrated mechanism capable of logging date and time information when the flashing beacons are activated and deactivated.
2.Be capable of locally storing 30 days of activation/deactivation records with a time and date stamp, GPS location, sign panel orientation, WPT identification number, Administration project number, and have sufficient memory to store at least 100,000 records in the cloud.
3.Be capable of remote access to activate/deactivate, retrieve records, and to download records in a printable format.
4.Be capable of transmitting real-time information of device activation/deactivation and updated every 15 minutes. Information shall be retained for one year following project completion date and be stored in the cloud and available to the Administration upon request.
5.Reports indicating the date and time flashing beacons are activated and deactivated, GPS location, sign panel orientation, WPT identification number, shall be provided daily to the Office of Traffic and Safety and its designated representative.
104.24.03 Construction
Furnish, install and test the WPT on the project site 24 hours in advance of actual use to ensure that each unit is functioning properly. Place the WPT unit as shown in the Contract Documents or as directed and aim WPT at approaching traffic to ensure sign panel and flashing beacons are visible and legible for a distance of 900 ft from any point along the travel approach roadway. Ensure the WPT is level and that the sign face is not obscured by highway alignment or glare from either sunlight or vehicle headlights. Install temporary concrete traffic barrier or drums around the WPT according to the Book of Standards and the Contract Documents. Activate the WPT when workers are present in the work zone. Deactivate the WPT when workers are not present. Ensure that the WPT is operational for duration while workers are present in the work zone.
104.24 Workers Present Trailer (Wpt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS The WPT shall be able to withstand wind of 80 mph.
104.24.04 Measurement and Payment
104.24.04 01 Workers Present Trailer will be measured and paid for at the Contract price per unit
day for each Workers Present Trailer unit. A unit day will consist of any approved usage within a work shift, regardless of start time or whether the shift runs into another calendar day. Each Workers Present Trailer will be paid for only once per unit day, regardless of how many times it is relocated. When a Workers Present Trailer is used for part of a day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of a Workers Present Trailer, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for the Workers Present Trailer and for all material, labor, equipment, tools and incidentals necessary to furnish, install, operate, and maintain the Workers Present Trailer at the site as required and at any relocated site as specified or as directed.
104.24.04 02 Workers Present Trailer related sign R2-6(5) will not be measured but the cost will
be incidental to the Contract unit price for Workers Present Trailer.
104.24.04 03 The signal heads/beacons will not be measured but the cost will be incidental to the
Contract unit price for the Workers Present Trailer.
104.26 Removable Rumble Strips
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.26 — REMOVABLE RUMBLE STRIPS
104.26.01 Description
Furnish, install, maintain, and remove removable rumble strips.
104.26.02 Materials
Removable Rumble Strips QPL Rumble strips shall be white in color, 4 in. wide, and 0.250 in. thick.
104.26.03 Construction
104.26.03 01 Quality Assurance/Quality Control. Perform quality control testing using
technicians certified by the Administration.
104.26.03 02 Warranty Period. Maintain the rumble strips and repair defects for a period of
180 days from the date of application. Replace as necessary within this period as directed at no additional cost to the Administration. Refer to GP-5.11. At least 90 percent of the total number of rumble strips in any lane shall be free from signs of failure due to blistering, excessive cracking, discoloration, smearing or spreading under heat, chipping, spalling, or poor adhesion to the pavement. Replace rumble strips showing wear or a thickness less than 0.20 in.
104.26.03 03 Application and Removal. The pavement surfaces shall be completely dry and
free of oil, grease, sand, dirt, dust, loose aggregate, soil, salt, and other contaminants. Apply the rumble strips in accordance with the manufacturer’s recommendations and the Contract Documents. Place perpendicular to the flow of traffic and located as specified. Space the strips between 4 ft and 10 ft on center, with a pattern of at least 10 but not more than 12 strips per set. Decrease the spacing within each set as motorists approach the work zone. The spacing between the sets shall be as specified. Do not place on sharp horizontal or vertical curves. Use in conjunction with other traffic control devices or visual cues that will assist drivers in identifying the appropriate action to take.
104.26 Removable Rumble Strips
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS For installations where the roadway is wider than one lane in each direction, install in one-lane width segments utilizing butt joints. Do not overlap. Continue at least 1 ft onto each shoulder. Do not install over pavement seams, joints, or deteriorating markings and substrates. When no longer required, remove rumble strips and residue. Return the pavement surface to its original condition.
104.26.04 Measurement and Payment
Removable Rumble Strips will be measured and paid for at the Contract unit price per linear foot. The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work. Removal and replacement required beyond the 180 day period will be measured and paid for at the Contract unit price for the Removable Rumble Strip item. Replacements made during the service life due to plowing will be paid for at the Contract unit price for the Removable Rumble Strip item.
104.26.04 01 Removal, Replacement, and Corrective Actions. Any additional cost, including
maintenance of traffic, for the removal of rumble strips that are installed inaccurately or incorrectly shall be at no additional cost to the Administration. In addition, the current road user fee will be applied when traffic disruption occurs during corrective actions.
104.27 Temporary Portable Rumble Strips (Tprs)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.27 — TEMPORARY PORTABLE RUMBLE STRIPS (TPRS)
104.27.01 Description
Furnish, install, maintain, adjust, and remove temporary portable rumble strips (TPRS). Work shall consist of preparing the road surface, installing, maintaining, adjusting, and removing temporary rumble strips in construction work zones at the locations shown in the Contract Documents or as directed.
104.27.02 Materials
Temporary Portable Removable Rumble Strips QPL
104.27.02 01 TPRS shall consist of thermoset cast urethane, engineered polymers, or rubber
materials. TPRS shall not curl or deform across the width of the strip, maintaining its rigidity. The face of the strips shall be a non-slip textured surface. Each strip shall be capable of being installed without adhesives or bolts.
104.27.02 02 TPRS shall consist of a single segment or be comprised of interlocking sections. The
color of the TPRS shall be white, orange, or black. Each TPRS segment shall be 3/4 in. to 1 in. thick, 10 ft to 12 ft long, and 8 in. to 15 in. wide. TPRS shall be deemed safe by the manufacturer for use by motorcycles and able to withstand tractor trailer traffic with minimal movement.
104.27.03 Construction
104.27.03 01 Installation, Monitoring, and Removal. Select the appropriate TPRS from the
QPL for the posted speed limit of the roadway. Provide a copy of the manufacturer’s installation guidelines to the Engineer. Install and remove according to the manufacturer’s recommendations and the Contract Documents. Verify placement with the Engineer prior to installation. Each segment shall be uniform in color throughout the work zone.
104.27.03 02 Installation. Do not use TPRS on loose gravel, bleeding asphalt, heavily rutted
pavements, milled or unpaved surfaces. Do not place TPRS through pedestrian crossings and railroad crossings. Do not use TPRS in rain, snow, or icy weather conditions. Do not extend TPRS onto the shoulder without the approval of the Engineer. Do not place TPRS on sharp horizontal or vertical curves; instead, install TPRS in advance of the curve so they are visible to approaching traffic.
104.27 Temporary Portable Rumble Strips (Tprs)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Clean the roadway to remove dust, sand, and other debris. Arrange the strips in an array consisting of three complete strips per lane spaced and configured according to the manufacturer’s recommendations and the Book of Standards. The length of each strip, whether comprised of one segment or interlocking segments, should be within 12 in. of the full lane width. Center TPRS in the lane.
104.27.03 03 Monitoring. Monitor, maintain alignment, and repair the TPRS if needed. Ensure
that the rumble strips are perpendicular to the lane and that the correct spacing between rumble strips is maintained at all times. Correct the positioning of the rumble strips if any strip moves by more than 1 ft in any direction during the work period. If any strip comes out of alignment, clean the strip on both sides, and reset the strip onto a clean roadway surface.
104.27.03 04 Removal. Remove TPRS from the roadway when lane restrictions are removed or
as directed. After removing the TPRS, clean and restore pavement to normal condition.
104.27.04 Measurement and Payment
The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.27.04 01 The initial installation of Temporary Portable Rumble Strips will be measured and
paid for at the Contract unit price per each array per unit day. A unit day will consist of any approved usage within a 24 hour calendar day period. When a temporary portable rumble strip array is used for part of a day, it will be measured and paid for as a unit day. An array consists of three complete temporary portable rumble strips spanning a single lane. Payment will be full compensation for cleaning the roadway surface, installing the rumble strip, and maintaining the strip through the duration of each day’s use, including cleaning and resetting of the strip if it comes out of alignment.
104.27.04 02 Remove and Relocate Temporary Portable Rumble Strips will be paid for at the
Contract unit price per each array. The payment includes removal of the temporary portable rumble strip array, relocating the array to a new location, cleaning the roadway surface, installing the rumble strips, and maintaining the strips through the duration of each day’s use, including cleaning and resetting the strip if it comes out of alignment.
104.27.04 03 Removal of the temporary portable rumble strips at the end of each workday and
final removal will be incidental to the item Temporary Portable Rumble Strips, including cleaning and restoring the pavement to normal conditions.
104.28 Speed Display Trailer (Sdt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.28 — SPEED DISPLAY TRAILER (SDT)
104.28.01 Description
Furnish, install, operate, maintain, relocate, and remove a portable, self-contained, trailer mounted, speed display trailer (SDT) with static speed limit sign. The SDT includes a static speed limit sign and a speed feedback sign (dynamic radar speed display). The SDT shall be compliant with the Maryland Manual on Uniform Traffic Control Devices (MdMUTCD) and Maryland Standard Sign Book.
104.28.02 Materials
Speed Display Trailer QPL Reflectorization 950.03 Sign Material 950.08 Each SDT shall include the trailer, structural support system, sign panel assembly, lift mechanism, power supplies, trailer mounted controller, non-invasive speed detection device, and ancillary equipment. All materials for the SDT shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities typically found along the edge of a traveled roadway. Construction, materials, and operation shall be in accordance with NFPA, UL, and NEC. The SDT trailer shall be painted orange and shall comply with Maryland Motor Vehicle Law.
104.28.02 01 Equipment.
a.Speed Feedback Sign (SFS). A SFS shall supplement the static speed limit sign and shall be positioned below the speed limit sign. It shall consist of a static and a dynamic display. The SFS shall not flash, strobe, change color, or use other animated elements integrated into the dynamic display.
1.Static. The static portion of the SFS shall include the YOUR SPEED legend and shall have a black legend on a fluorescent yellow background. The minimum letter height shall be 6 in. with Series C Standard Alphabet font from the Maryland Standard Sign
104.28 Speed Display Trailer (Sdt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Book. Reflective sheeting shall be as specified in 950.03. The sign shall be rectangular in shape.
2.Dynamic. The format of the message to be displayed on the changeable message sign (CMS) portion of the sign shall be XX where XX is the measured vehicle speed in miles per hour (mph). The color of the changeable message legend shall be a yellow (amber) luminous legend on a black opaque background. The minimum LED number height shall be 14 in. The width of the numbers shall be similar to Series E Standard Alphabet font from the Maryland Standard Sign Book. The CMS shall produce brightness greater than 10,000 candela per square meter at maximum intensity. The housing for the dynamic components shall be a minimum National Electrical Manufacturers Association (NEMA) 3R rated. The display shall adjust automatically for ambient or operational light conditions. The CMS display may use a full or discrete matrix display. If discrete matrix display is used, each character shall be displayed using a minimum array of 5 columns by 7 rows with at least two array modules per line. If a full matrix display is used, the sign shall have a pixel arrangement of at least 5 columns by 7 rows per character with at least 3 LEDs per pixel. The CMS shall conform to ITE specifications for yellow (amber) color warning applications. The CMS shall provide full illumination within at least a 24 degree cone perpendicular to the sign face. The operating temperature range of the LED shall be -30 F to 125 F.
b.Static Speed Limit Sign Panel. A R2-1 (48 in. x 60 in.) Speed Limit sign shall be attached to the trailer. The sign shall be easily removed and replaced. The static sign face shall be reflectorized as specified in 950.03. The top of the Speed Limit sign shall include a Work Zone plaque with a minimum size of 48 in. x 12 in. The Work Zone plaque shall have a black legend and border on a fluorescent orange background with 6 in. Series C Standard Alphabet font from the Maryland Standard Sign Book.
c.Trailer. In accordance with Maryland Motor Vehicle Law governing trailers.
d.Lift Mechanism.
1.The lift mechanism shall be installed such that the sign panel can be raised and lowered.
2.A corrosion resistant safety bolt or pin shall be provided to prevent the sign panel from lowering once in the raised position. A self-locking mechanism shall be incorporated into the safety bolt or pin to prevent it from being inadvertently dislodged.
e.Electrical Connections and Gauges.
1.All wiring from power sources to SDT equipment shall use locking cable connectors.
2.Volt and amp gauges shall be provided for DC.
3.Standard negative ground system shall be tied to the sign chassis.
104.28 Speed Display Trailer (Sdt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
f.Power Supply. The SDT shall operate from a solar powered electrical system consisting of battery power and solar array panels. The electrical system shall be capable of supporting continuous operation of the system for 21 consecutive days without an auxiliary charge, and be capable of being charged by a generator or other commercially available power source in case of malfunction, damage, or failure of the primary solar powered electrical system.
g.Controller Requirements. The controller shall be capable of the following.
1.Controlling the SFS operating over a -30 F to 125 F range and in a 20 percent to 95 percent noncondensing humidity range.
2.Designed for fail-safe prevention of improper information display in the case of a system malfunction.
3.Monitoring and displaying the battery output voltage and solar array actives (charging and discharging).
4.Monitoring and displaying the status of the photocell and adjusting the sign illumination to match the ambient light conditions. The controller shall have at least nine levels of dimming from 10 percent to 100 percent brightness.
5.Being contained in a sheet metal or high-density polyethylene (HDPE), weatherproof cabinet located on the controller housing and insulated to protect against excessive vibration and temperature. The cabinet shall be equipped with a lockable door with hasp/lock setup installed in a manner to maximize its effectiveness in stopping unauthorized access to the controls. Other physical locking devices may be approved by the Engineer. The cabinet shall have an interior cabinet light or backlit controller display.
6.Having remote access to modify speed thresholds, and download vehicle speed readings.
7.Storing vehicle speed readings with a time and date stamp and have sufficient memory to store 100,000 readings.
h.Speed Display Software.
1.The SDT shall be supplied with a non-invasive speed detection unit. The unit shall be able to be rotated on a separate vertical axis from the SDT to allow for better aiming and detection. The unit shall detect and display the speed of only approaching traffic.
2.The speed display software shall be able to display vehicle speeds that are traveling over a set threshold. The SDT shall also be capable of not displaying a vehicle speed over a separate set threshold.
104.28 Speed Display Trailer (Sdt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
3.The SDT speed display software shall have the capability of modifying speed thresholds.
i.Warning Beacons. Warning lights and/or beacons shall not be attached to the sign or the trailer.
104.28.03 Construction
Furnish, install and test the SDT on the project site 24 hours in advance of actual use to ensure that the unit is functioning properly. Coordinate location with Administration and its Automated Speed Enforcement Contractor for Automated Speed Enforcement. Place the SDT unit as shown in the Contract Documents or as directed and aim SDT at approaching traffic to ensure sign panel is visible for a minimum distance of 600 ft for nighttime conditions and 800 ft for normal daylight conditions from any point along the travel approach roadway. Ensure the SDT is level and that the sign face is not obscured by highway alignment or glare from vehicle headlights. Install temporary concrete traffic barrier or drums around the SDT according to the Book of Standards and the Contract Documents. The SDT shall be able to withstand wind of 80 mph. When deployed, the mounting height to the bottom of the speed limit sign shall be a minimum of 7 ft from near edge of traveled roadway in accordance with the MdMUTCD. The mounting height to the bottom of the SFS shall be high enough to ensure traffic barrier, devices, or other obstructions will not block visibility of the SFS. The Contractor is responsible for continuous operation of the SDT including any maintenance, repair, troubleshooting, or replacement.
104.28.04 Measurement and Payment
104.28.04 01 Speed Display Trailer will be measured and paid for at the Contract price per unit
day for each Speed Display Trailer unit. Each Speed Display Trailer will be paid for only once per unit day, regardless of how many times it is relocated. When a Speed Display Trailer is used for part of a day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of a Speed Display Trailer, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for the Speed Display Trailer and for all material, labor, equipment, tools, and incidentals necessary to furnish, install, operate, and maintain the Speed Display Trailer as specified or as directed.
104.28.04 02 Signs attached to the Speed Display Trailer will not be measured but the cost will be
incidental to the Contract unit price for the pertinent Speed Display Trailer item.
104.28 Speed Display Trailer (Sdt)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.28.04 03 Drums for Maintenance of Traffic. Drums will be measured and paid for as specified
in 104.12.
104.28.04 04 Temporary Concrete Traffic Barrier and Reset Temporary Concrete Traffic Barrier
shall be measured and paid for as specified in 104.04.04. Reflective Barrier Markers and Vertical Panels shall be measured and paid for as specified in 104.04.04.
104.28.04 05 Temporary Traffic Barrier End Treatments, Remove and Reset Temporary Traffic
Barrier End Treatments and Repairing Temporary Traffic Barrier End Treatments will be measured and paid for as specified in 104.09.04
104.29 Truck Mounted Variable Message Sign (Tvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.29 — TRUCK MOUNTED VARIABLE MESSAGE SIGN (TVMS)
104.29.01 Description
Furnish, install and relocate a portable, self-contained, truck mounted, variable message sign.
104.29.02 Materials
Each unit shall contain the work vehicle structural support system, sign panel assembly, lift mechanism, power supplies, sign mounted controller, and ancillary equipment. All materials for TVMS shall be like new, corrosion resistant, and unaffected by water spray, salt, oil, gasoline, and all other contaminants in the quantities normally found along the edge of the traveled roadway. The TVMS construction, materials, and operation shall meet NFPA, UL, and NEC. Ensure that sign messages are visible and legible for a distance of 900 ft from any point along the traveled approach roadway at all times. The TVMS shall not block the driver’s rear view vision when either in the transport or the deployed position.
104.29.03 Construction
104.29.03 01 Equipment.
Truck. The work vehicle size and the method of attachment shall be as specified in the manufacturer's specifications. All vehicles shall be in accordance with Maryland Motor Vehicle Law. Structural Support. The structural support framework shall allow the system to be assembled into a unit and be mounted on the truck and shall provide the support mechanism between the sign panel assembly, the power supply, and the controller. The framework shall provide sufficient support to prevent damage to any TVMS components when the sign is in the down and locked position during normal highway travel. The sign panel shall be mounted as a permanent fixture of the truck and provide a minimum height of 7 ft from the bottom of the sign to the surface of the roadway when in its operating position. Affixing a trailer mounted unit to a truck is prohibited.
104.29 Truck Mounted Variable Message Sign (Tvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS The deployed structure shall supply adequate support to allow complete sign operation including raising and lowering of the sign panel during sustained wind speeds of 85 mph. The display windows shall be made of impact-resistant clear Lexan or as approved. Sign Panel. Sign panel dimensions shall not exceed 92 in. wide by 54 in. high unless approved. The TVMS shall be capable of displaying three lines of text with the following requirements:
a.Each line of text shall be constructed using a full matrix display.
b.The sign shall be capable of displaying six characters per line.
c.The character height shall be at least 12 in.
d.The sign shall have a pixel arrangement of at least 20 rows by 40 columns, with at least 3 LEDs per pixel. LED Illumination. LED illumination for each matrix element shall have the following characteristics:
a.LED shall meet to the ITE specification for amber color.
b.LED shall utilize A1InGap substrate.
c.Each LED shall produce at least one candela output on center at 25 mA drive current.
d.LED shall provide full illumination within at least a 24 degree cone perpendicular to the sign face.
e.Operating temperature range of the LED shall be -30 F to 125 F. TVMS Unit. Submit a catalog cut and character set for any TVMS approval to the Office of Traffic and Safety, Chief of Traffic Operations. Furnish examples of standard messages to be used on the sign. Lift Mechanism.
a.The lift mechanism shall be capable of being raised and lowered manually.
b.A self-locking mechanism shall be provided to prevent the sign panel from lowering once in the raised position. Electrical Connections and Gauges.
a.All wiring from power sources to TVMS equipment shall use locking cable connectors.
104.29 Truck Mounted Variable Message Sign (Tvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
b.Each sign shall be equipped with an automatic lamp intensity regulator that maintains a constant output with a varying battery voltage.
c.Standard negative ground system shall be tied to the vehicle chassis. Power Supply. The TVMS shall operate from a solar powered electrical system. Sign Controller. The controller shall:
a.Be capable of driving the matrix display panel operating over a -30 F to 125 F range and in a 20 percent to 95 percent noncondensing humidity range.
b.Accommodate 50 preprogrammed, user-defined messages.
c.Be capable of displaying three sequenced messages. On/Off time for each message in a sequence shall be user adjustable at one-tenth of a second increments within a range of 0 second to 5 seconds.
d.Be designed for fail-safe prevention of improper information display in the case of a system malfunction. In the event of a system malfunction, the sign shall display a blank message.
e.Have the capability of retrieving all messages stored in temporary memory.
1.Temporary memory shall be nonvolatile.
2.All messages and programs shall remain resident in the controller’s memory in the event of a power failure.
3.Have an RS-232 port to facilitate connection of an external communication device.
f.Monitor and display the battery output voltage and solar array activities (charging and discharging) and blank the sign when the battery output voltage drops below the manufacturer’s recommended output level.
g.Be capable of monitoring and displaying the status of the photocell, adjust the sign illumination to match the ambient light conditions, and have at least nine levels of dimming from 10 percent to 100 percent brightness.
h.Be contained in a sheet metal or high density polyethylene (HDPE), weatherproof cabinet located on the controller housing, and insulated to protect against excessive vibration and temperature.
1.The cabinet shall have a lockable door latch.
104.29 Truck Mounted Variable Message Sign (Tvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
2.The keyboard/input device storage location shall be provided inside the cabinet. Character Set Software. The character set software shall:
a.Have all the standard ASCII characters and symbols.
b.Provide left and right arrows.
c.Have all alphanumeric entries performed with a keyboard or keypad that causes the same character to be displayed on the matrix. Arrow symbols shall be generated via a cursor pad on the keyboard or keypad.
d.Have messages default to self-centering display with the ability to left or right justify.
104.29.03 02 Operation. Set up and operate the TVMS 24 hours in advance of actual use to
ensure that each unit is functioning properly and approved. Variable Message Sign Mode. Use the TVMS in variable message sign mode on roadways where the posted speed limit is less than or equal to 40 mph. The TVMS is intended for mobile operations. If used for stationary construction or maintenance operations, do not leave the TVMS in place for more than eight consecutive hours. Arrow Panel Mode. The TVMS may be used in lieu of a Type C arrow panel on any roadway as long as the TVMS is capable of displaying a left arrow, right arrow, double arrow, and a four- corner caution mode and as specified in 104.07.03. Lights with a preflash option of white strobe or pulsed lighting shall not be displayed. Use the TVMS only as a supplement to other required traffic control devices. When closing a through travel lane on a multilane roadway, use the “Arrow” mode only. Only one TVMS in the “Arrow” mode shall be used for each stationary lane closure. Moving work operations may utilize one or more TVMS for a single lane closure.
a.Ensure that the placement does not cause driver confusion near ramps, median crossovers, and side road intersections.
b.For stationary lane closures, place the TVMS on the shoulder at the beginning of the taper (nearest to oncoming traffic). Where there are narrow or no existing shoulders adjacent to the closed lane behind the channelizing devices, place the TVMS as near to the beginning of the taper as possible.
c.For moving maintenance type activities along multilane highways where a lane is closed, place the TVMS at the rear of the activity in the closed lane on a vehicle separate from the maintenance vehicle itself. For paint striping activities, additional vehicles with TVMS or arrow panels in the arrow mode may be required to supplement the work operation. TVMS shall always remain upstream of the maintenance vehicles where
104.29 Truck Mounted Variable Message Sign (Tvms)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS adequate recognition distance is available. The vehicle carrying the TVMS shall be equipped with signing and lighting as required by the standard TCPs.
d.TVMS shall only display the “Caution” mode for a lane closure on a two-lane, two- way roadway, or for a shoulder closure on any roadway. The “Caution” mode on a TVMS shall show displays of circular appearance in each of the four corners of the TVMS. The circle diameters shall range from 9.5 in. to 11 in. and utilize approximately 30 pixels. The circles shall be offset from the left and right edge between 3 in. and 6 in. and from the top and bottom edge between 1.5 in. and 3 in. The vertical spacing between the centers of the circles shall range from 2.5 to 3 times the diameter of the circles. The horizontal spacing between the centers of the circles shall range from 1.75 to 2 times the vertical spacing. Install the TVMS as specified. The TVMS shall be designed so that it supplies a minimum visibility and legibility distance of 900 ft. Ensure that the TVMS is level and that the sign face is not obscured by highway alignment or glare from either sunlight or vehicle headlights.
104.29.04 Measurement and Payment
Truck Mounted Variable Message Sign will be measured and paid for at the Contract price per unit day. A unit day will consist of any approved usage within a work shift, regardless of start time or whether the shift runs into another calendar day. Each truck mounted variable message sign will be paid for only once per unit day, regardless of how many times it may be relocated. When a truck mounted variable message sign is used for part of a day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of a truck mounted variable message sign, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for the vehicle, setup and maintenance of computer programs, changing messages, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.30 Portable Traffic Signal (Pts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.30 — PORTABLE TRAFFIC SIGNAL (PTS)
104.30.01 Description
Furnish, install, and maintain a portable, self-contained, trailer mounted traffic signal for maintenance of traffic operations as specified in the Contract Documents or as directed by the Engineer.
104.30.02 Materials
Portable Traffic Signal (PTS) As Approved by Office of Traffic and Safety
104.30.03 Construction
Place PTS trailers in the closed lane during alternating one-lane, two-way traffic operations, without intruding into the travel lane, or as directed by the Engineer. The Contractor is responsible for all setup procedures necessary for the PTS including setting up the trailers, setting up and testing the remote monitoring system notification, aiming signal heads, interconnecting the signal controllers, aiming, and adjusting vehicle detection units, and installing the timing provided by the Office of Traffic & Safety.
104.30.03 01 Equipment.
Each PTS shall be a trailer mounted unit. A PTS system shall consist of two or more trailers. Each unit shall be self-contained battery powered with solar assist, consist of two signal heads per trailer, and a solid state signal controller. One signal head should be mounted on an overhead mast arm capable of extending over the travel lane. The other signal head shall be mounted on a vertical upright. The PTS system shall have non-intrusive vehicle detectors and each PTS must be interconnected to each other at all times with a twisted pair shielded cable or wireless radio link with sufficient range, as specified in the Contract Documents or as directed. Trailer. The trailer shall conform to Maryland Motor Vehicle Law governing trailers. Support Structure. The PTS trailer shall be capable of accommodating a vertical upright and a horizontal mast arm. The trailer and all mounted equipment shall be structurally adequate for unlimited, normal operation in wind velocities typically encountered on the roadway (gusts of 80 MPH). No additional ballast shall be used to achieve the structural stability required for normal operation. Additional ballast includes but is not limited to, sandbags, concrete/cement blocks and
104.30 Portable Traffic Signal (Pts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS steel, cast, or iron weights (secured or unsecured). PTS trailers shall be manufactured to accommodate the option of transporting two signal trailers with one vehicle. Each signal trailer shall be equipped with four stabilizing/leveling jacks, one on each corner of the trailer. The PTS trailer shall have adequate structural integrity to facilitate lifting and placing the PTS trailer as required. Lift Mechanism. The PTS shall contain a lift mechanism that is electric or electrically-assisted hydraulic, as well as a manual mechanism capable of raising and lowering the mast arm. The mast arm shall extend a minimum of 9 ft from the side of the trailer. Signal Heads/Display Requirements. The PTS shall meet the physical display and operational requirements of conventional traffic signals according to Part IV of the MdMUTCD. Signal Heads shall be cast aluminum and have three, 12 in. LED indications, conforming to ITE Specifications for “Vehicle Traffic Control Signal Heads” and NEMA Standards TS1 and TS2. Signal heads shall be equipped with visors which extend beyond the signal head a minimum of 10 in. All signal housings shall have a black face and yellow housing. The signal heads shall have the ability to accommodate back plates and rotate horizontally 180 F. The PTS shall have a reversible signal head mounting feature which will allow two trailers to be placed in the same lane of traffic. Both signal heads shall be able to be rotated and locked into position to provide the optimum visibility to motorists. The overhead signal shall have a minimum clearance height of 17 ft and a maximum clearance height of 19 ft, measured from the bottom of the green indication to the road surface. The lower signal head shall be mounted to a vertical upright at a minimum height of 8 ft measured from the bottom of the green indication to the road surface. Power Requirements. Each PTS Trailer shall be equipped with batteries sufficient to operate the signal for a minimum of 21 days at 72 F without charging. The charging system shall include 390 watts (minimum) of solar collection capability and an onboard battery charger capable of being used with a 110 volt power source. The system shall also include an onboard monitoring system capable of regulating and providing a visual display of the battery voltage and solar input. Operational Requirements. Each PTS shall be equipped with an operating system having the following capabilities:
a.The signal controller shall be enclosed in a cabinet mounted on each trailer.
b.The controller shall be furnished with a keypad or LCD display screen to allow for the signal operator to program the signal under all weather conditions. The controller shall have the capability of connecting to a PC or laptop for programming.
c.The signal controller shall operate between -30 F and 150 F and in a 20 percent to 100 percent humidity range.
d.A conflict monitoring system conforming to NEMA Standards shall be provided.
e.The PTS shall have the capability of being operated in a fixed time, traffic actuated or manual control mode.
104.30 Portable Traffic Signal (Pts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
f.Fixed time mode operation option must include the ability to provide a minimum of five automatic signal timing changes within a 24 hour period.
g.The operating system shall have the ability to control a minimum of 7 traffic phases.
h.Programmable green times from 3 seconds to 250 seconds, yellow times from 3.5 seconds to 6 seconds, and red times from 1 second to 250 seconds shall be provided. All programmable green times shall be in 1 second increments. All programmable clearance times shall be in 0.5 second increments.
i.The PTS shall have the ability to facilitate minimum / maximum green time programming in the traffic actuated mode in a manner that will extend the green times in predetermined programmable segments as required.
j.The operating system shall have a programmable time-of-day feature that will allow the maximum green times to be changeable by time of day.
k.The operating system shall have the capability of facilitating standby modes of red, red flash and yellow flash mode.
l.The operating system shall be capable of facilitating traffic actuation with true presence capability.
m.The operating system shall have an integrated mechanism capable of recording system malfunctions including date and time of system failure. This information shall be available in a printable format.
n.The operating system shall be capable of accommodating a pre-emption system with optical activation which provides a priority green phase in the direction of appropriately equipped approaching emergency vehicles.
o.The operating system shall have the capability to allow the PTS to be connected to and controlled by a standard NEMA controller.
p.The operating system shall have a manual control option that will allow the Traffic Manager to manually control the signal to coordinate the PTS system for special operations.
q.The operating system shall be equipped with diagnostic capabilities in the event of a system default.
r.The system shall have the capability of identifying the default in a manner that will expedite the return to full operational mode.
104.30 Portable Traffic Signal (Pts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Monitoring System Requirement. Furnish and install PTS monitoring system capable of reporting signal location, battery voltage and system default. The monitoring system shall have the ability to communicate system default via text or email to responsible individuals. As specified in GP-2.04 verify available communications at the site, e.g., cellular or satellite, and select an appropriate PTS monitoring system that works with that communication method. Coordinate the installation of monitoring system with the ADE-T to develop an acceptable plan for monitoring signal operations and reporting on system default. Actuation Requirements. The PTS systems shall be capable of utilizing non-invasive detectors for traffic actuation. Acceptable non-invasive detectors include microwave motion sensors and video detection cameras. Acceptable PTS systems shall have the capability of being operated with both a motion and true presence actuation system. Communication Requirements. The PTS systems shall have the capability of being operated using hardwired or wireless communication. Field conditions will determine the method used for interconnection of the PTS system. The communication cable shall be deployed in a manner that will not intrude in the direct work area of the project or obstruct vehicular and pedestrian traffic. If a radio link communication option is utilized, a clear line of sight must be maintained between PTS units. The radio system shall conform to the applicable Federal Communication Commission requirements and all applicable state and local requirements. Should there be a failure in the communication link between the two signals, both signals shall be display solid red indications. Default Requirements. PTS systems shall have the capability of reverting to a solid red, red flash, or yellow flash mode upon system default. The default setting shall be solid red unless otherwise stated in the project specifications or as directed by the Engineer. Upon default the PTS system shall immediately contact a minimum of three responsible individuals via the remote monitoring system described in the Operational Requirement section. The PTS system repairs shall be the responsibility of the contactor and rendered in a manner that will return to PTS to full operation condition in the most expeditious manner. Field Operations. Set up, program, relocate, and maintain the PTS as per the Contract Documents or as directed by the Engineer, as recommended by the PTS manufacturer. Notify the Assistant District Engineer Traffic and the Office of Traffic and Safety at least three weeks prior to starting work. There will be no programming or timing changes to the PTS without written approval from the Office of Traffic and Safety. The contractor shall adjust or reconfigure the PTS operation only as directed by the Engineer, with approval from the Office of Traffic and Safety and the Assistant District Engineer Traffic. Operate the PTS as noted on the Maintenance of Traffic signalization plans, when available. Provide SHA with the name and telephone number of an emergency contact person to maintain and operate or repair the signals. Make provisions to have certified flaggers who have completed the SHA approved flagger training course and make provisions to have appropriate signing in place to maintain traffic at the PTS location in case of a PTS failure. Notify the Engineer, the Statewide
104.30 Portable Traffic Signal (Pts)
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Operations Center (SOC), and the ADE-T in the event of a failure. Maintain daily log at the signal site and record equipment malfunction.
104.30.04 Measurement and Payment
The Portable Traffic Signal will be measured and paid for at the Contract price per unit day. A unit day will consist of any approved usage within a normal work shift, regardless of start time or whether the shift runs into another calendar day. Each portable traffic signal will be paid for only once per unit day. When a portable traffic signal is used for part of a day, it will be measured and paid for as a unit day. When operations require continuous 24 hour use of a portable traffic signal, the unit day will be measured as 24 hour periods from start to finish. The payment will be full compensation for the provision, installation, operation, interconnection, monitoring system, maintenance, reconfiguration, adjustments, flaggers, signing, repair technicians, relocation as required by the Traffic Control Plan or as directed by the Engineer, and for all materials, labor, equipment, tools, training by the portable traffic signal manufacturer, and incidentals necessary to complete the work. Where other Contract pay items for Maintenance of Traffic are specified in the Contract Documents, measurement and payment shall conform to the pertinent items.
104.31 Accessible Pedestrian Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.31 — ACCESSIBLE PEDESTRIAN
104.31.01 Description
Provide and maintain an accessible pedestrian route, to the “maximum extent feasible”, throughout the project’s limits. When an existing pedestrian access route within the public right of way is blocked by construction, alteration, or maintenance activity, an alternate accessible pedestrian route shall be provided. The phrase, “maximum extent feasible”, applies in areas where the nature of an existing facility or site conditions makes it virtually impossible to comply fully with applicable accessibility standards through a planned alteration. In these circumstances, the alternate accessible pedestrian route shall provide the maximum physical accessibility that is feasible, or a design waiver must be approved by SHA’s Office of Highway Development.
104.31.02 Materials
Not applicable.
104.31.03 Construction
Consider the following items when addressing accessible pedestrian maintenance of traffic:
a.All pedestrians, including persons with disabilities, shall be provided with a reasonably safe, convenient and accessible path that replicates as much as practicable the existing pedestrian facilities.
b.The width of the existing pedestrian facility should be maintained if practical. When it is not possible to maintain a minimum width of 60 in. throughout the entire length of the pedestrian route, a minimum width of 36 in. shall be provided with 60 in. x 60 in. passing zones at least every 200 ft, to allow individuals in wheelchairs to pass.
c.Traffic control devices and other construction materials and features shall not intrude into the usable width of the sidewalk, temporary pathway or other pedestrian facility.
d.Signs and other devices mounted lower than 7 ft above the temporary pedestrian pathway shall not project more than 4 in. into accessible pedestrian route.
104.31 Accessible Pedestrian Maintenance of Traffic
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
e.A smooth, continuous hard surface shall be provided throughout the entire length and width of the pedestrian route throughout construction. There shall be no curbs or vertical elevation changes greater than 1/4 in. in grade or terrain that could cause tripping or be a barrier to wheelchair use. Vertical elevation differences between 1/4 in. and 1/2 in. shall be beveled at a maximum 2:1 slope.
f.When channelization is used to delineate a pedestrian pathway, a continuous detectable edging should be provided throughout the length of the facility such that pedestrians using a white cane can follow it. Edging should protrude at least 6 in. above the surface of the sidewalk or pathway with the bottom of the edging a maximum of 2.5 in. above the surface.
g.Temporary ramps shall be provided when an alternate pedestrian route crosses a curb, and no permanent ramps are in place. The width of the ramp shall be a minimum of 36 in. and the slope of the ramp shall not exceed 12:1. Temporary detectable warning mats must be installed at street crossings and signalized entrances.
h.When possible, an accessible pedestrian route shall be provided on the same side of the street as the disrupted route. When it is not feasible to provide a same-side accessible pedestrian route an accessible pedestrian detour route shall be provided.
i.Information regarding closed pedestrian routes, alternate crossings, and sign and signal information shall be communicated to pedestrians with visual disabilities by providing devices such as audible information devices, accessible pedestrian signals or barriers and channelizing devices that are detectable to the pedestrians traveling with the aid of a white cane or who have low vision.
j.It is desirable that pedestrians cross to the opposite side of the roadway at intersections rather than mid-block. Appropriate signing shall be placed at the intersections.
k.Access to transit stops shall be provided and maintained at all times.
104.31.04 Measurement and Payment
Unless otherwise specified, Accessible Pedestrian Maintenance of Traffic will not be measured but the cost will be incidental to the Lump Sum item for Maintenance of Traffic. The payment will be full compensation for all materials, labor, equipment, tools, and incidentals necessary to complete the work.
104.32 Static Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.32 — STATIC AUTOMATED SPEED ENFORCEMENT
104.32.01 Description
Coordinate with the Administration and its Automated Speed Enforcement Contractor for Automated Speed Enforcement (ASE) in the work zone. Provide work zone signage, workers present trailer(s), speed display trailer(s), and protection devices to accommodate ASE in the work zone. Contact the Office of Traffic and Safety Traffic Development and Support Division (OOTS TDSD) ASE program representative (410-787-5860) at least two weeks prior to fabricating and installing ASE signs to determine exact locations for the ASE unit(s), ASE signs, workers present trailer(s), and speed display trailer(s).
104.32.02 Materials
Temporary Concrete Traffic Barrier (TCB) for Maintenance of Traffic 104.04.02 Temporary Traffic Signs (TTS) 104.08.02 Temporary Traffic Barrier End Treatments 104.09.02 Temporary Crash Cushion Sand Filled Plastic Barrels (SFPB) 104.10.02 Drums for Maintenance of Traffic 104.12.02 Cones for Maintenance of Traffic 104.14.02 Protection Vehicle (PV) Section 104.23 Speed Display Trailer (SDT) 104.28.02 Aggregate for Maintenance of Traffic 105.02 Reflectorization 950.03 Workers Present Trailer (WPT) 104.24.02
104.32.03 Construction
104.32.03 01 General. Refer to Standard No. MD 104.06-26A. Static Automated Speed
Enforcement (ASE) will be used in the work zone to enhance safety for the workers and traveling public. The Administration will provide a mobile ASE system, including speed enforcement equipment, ASE unit(s), and labor for ASE system operation. The Contractor will provide (furnish, install, relocate and remove) all of the applicable ASE signing, the workers present trailer(s), the speed display trailer(s), and protection devices as required.
104.32 Static Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Coordinate and cooperate with the Project Engineer and the ASE program representative to implement the ASE system on this project throughout construction. The ASE program representative is located in the Office of Traffic and Safety, Traffic Development and Support Division. Obtain approval from the ASE program representative for the ASE unit location(s), ASE sign locations and sizes, workers present trailer location(s), and speed display trailer location(s). At least two weeks prior to the start of the project, arrange a field meeting with the Project Engineer and the ASE program representative to verify the sign types, sizes and locations. At this meeting, jointly identify locations for the ASE unit(s), workers present trailer(s), and speed display trailer(s) with the ASE program representative. Contact the Project Engineer and the ASE program representative a minimum of two weeks prior to all phase changes or construction activities that require relocation of the ASE unit(s). When activities occur that require relocation of the ASE unit(s), arrange a field meeting with the Project Engineer and the ASE program representative to verify the suitability of existing and/or identify new location(s) for the ASE unit(s), advance warning signs, workers present trailer(s), speed display trailer(s), and all required protection devices. Where feasible, provide bathroom facilities in a location that can be used by construction personnel and the ASE unit operators. Make the bathroom facilities available and accessible to the ASE unit operators twenty-four hours a day, seven days a week. Provide the bathroom facilities at a location within a reasonable walking distance of the ASE unit deployment location and where the ASE unit operator does not have to cross travel lanes to access the facilities. Inform the Administration within 30 minutes of starting and ending work the exact start time(s) and exact end time(s) when workers are present in the work zone.
104.32.03 02 Temporary Traffic Signs for ASE. Refer to 104.08.03. Provide automated speed
enforcement advanced warning signs on each approach to the work zone, including ramps. These signs shall consist of ASE advance notice signs and ASE speed limit signs, as shown on the plans and/or as directed by the ASE program representative. Additional ASE signs may be requested by the ASE program representative based on project needs. Prior to sign acquisition, coordinate with the Project Engineer and the ASE program representative a minimum of two weeks in advance to verify the sign types, colors of sign background and legend, materials, sizes, and locations of signs. Relocate and/or install new ASE signs as needed throughout construction.
104.32.03 03 Aggregate for Maintenance of Traffic. Refer to 105.03. Where the ASE unit
deployment location is not on hard surface, construct a level stone entrance and pad adjacent to the roadway for the ASE enforcement unit. Provide a safe means for the ASE unit operators to enter/exit the enforcement area.
104.32.04 04 Temporary Traffic Barrier. Refer to 104.04.03. Provide protection for the ASE
unit, either behind temporary concrete barrier or existing W-beam.
104.32.03 05 Speed Display Trailer. Refer to 104.28.03. Furnish, install, maintain, relocate and
remove a speed display trailer(s) as shown on the plans and/or as directed by the ASE program
104.32 Static Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS representative. Construct a level area adjacent to the shoulder for placement of the speed display trailer(s) as needed. Periodically inspect the speed display trailer(s) and make adjustments as needed to ensure proper function. Relocate and/or install new speed display trailer(s) as needed throughout construction.
104.32.03 06 Maintenance of Traffic. Conduct maintenance of traffic as specified in 104.02.03
where required for installation, relocation, or removal of temporary traffic control devices for ASE activities.
104.32.03 07 Temporary Traffic Barrier End Treatments. Refer to 104.09.03.
104.32.03 08 Temporary Crash Cushion Sand Filled Plastic Barrels. Refer to 104.10.03.
104.32.03 09 Drums for Maintenance of Traffic. Refer to 104.12.03.
104.32.03 10 Cones for Maintenance of Traffic. Refer to 104.14.03.
104.32.03 11 Workers Present Trailer. Refer to 104.24.03.
Provide a workers present trailer(s) (furnish, install, maintain, relocate and remove) as shown on the plans and/or as directed by the ASE program representative. Construct a level area adjacent to the shoulder for placement of the workers present trailer(s) as needed. Periodically inspect the workers present trailer(s) and make adjustments as needed to ensure proper function. Relocate and/or install additional workers present trailer(s) as needed throughout construction. Activate the flashing lights on the workers present trailer(s) when workers are present in the work zone. Deactivate the flashing lights on the workers present trailer(s) when workers are not present in the work zone.
104.32.04 Measurement and Payment
The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work including relocating, turning, completely covering and uncovering or removing and resetting, maintaining in like new condition, and cleaning existing and temporary traffic signs and other traffic control devices related to the operation of the Automated Speed Enforcement. The pay item will include the following items unless otherwise specified.
104.32.04 01 Maintenance of Traffic for Automated Speed Enforcement will not be measured but
will be paid for at the Contract lump sum price. The payment will be full compensation for relocating, turning, completely covering and uncovering or removing and resetting, maintain in like new condition, and cleaning existing and temporary traffic signs and other traffic control devices related to the operation of the Automated Speed Enforcement. Included is the treatment of any other traffic control device not included in these Specifications but necessary for the fulfillment of the Contract requirements, and for all material, labor, equipment, tools and incidentals necessary to complete the work. Payment of the Contract lump sum price will be
104.32 Static Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS prorated and paid in equal amounts on each monthly estimate. The number of months used for prorating will be the number estimated to complete the work.
104.32.04 02 Temporary Concrete Traffic Barrier and Reset Temporary Concrete Traffic Barrier
shall be measured and paid for as specified in 104.04.04. Reflective Barrier Markers and Vertical Panels shall be measured and paid for as specified in 104.04.04.
104.32.04 03 Temporary Traffic Signs will be measured and paid for as specified in 104.08.04.
When ASE advance warning and speed limit signs are furnished by the Administration or by the Administration’s ASE Contractor, the Contractor will be responsible for set-up, take down and relocation of these signs. Signs shall be placed per the direction of the ASE program representative and in accordance with the requirements of Section 104.08. Signs furnished by the Administration or by the Administration’s ASE Contractor and provided to the Contractor will be measured and paid for at the Contract unit price per square foot as specified in 104.08.04. The payment will be full compensation for furnishing the supports, installation, relocation, maintenance, cleaning, removal, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.32.04 04 Temporary Traffic Barrier End Treatments, Remove and Reset Temporary Traffic
Barrier End Treatments and Repairing Temporary Traffic Barrier End Treatments will be measured and paid for as specified in 104.09.04.
104.32.04 05 Temporary Crash Cushion Sand Filled Plastic Barrels shall be measured and paid for
as specified in 104.10.04.
104.32.04 06 Drums for Maintenance of Traffic shall be measured and paid for as specified in
104.12 04.
104.32.04 07 Cones for Maintenance of Traffic shall be measured and paid for as specified in
104.14 04.
104.32.04 08 If requested, the Protection Vehicle shall be measured and paid for as specified in
104.23 04.
104.32.04 09 Speed Display Trailer will be measured and paid for as specified in 104.28.04.
104.32.04 10 Supply of materials for, installation of, and removal of stone construction entrance(s)
and pad(s) for ASE units will be measured and paid for as specified in 105.04.
104.32.04 11 Workers Present Trailer will be measured and paid for as specified in 104.24.
104.33 Flexible Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 100 PRELIMINARY SECTION 104.33 — FLEXIBLE AUTOMATED SPEED ENFORCEMENT
104.33.01 Description
Flexible Automated Speed Enforcement (ASE) deployments are used when work activity is 60 days or less and may include different ASE deployment locations for each work shift. Projects using flexible ASE generally require set up and removal of maintenance of traffic items at the start and end of each shift. Example projects include resurfacing, restoration and rehabilitation projects, maintenance projects, etc. Coordinate with the Administration and its Automated Speed Enforcement Contractor for ASE in the work zone. Provide work zone signage, workers present trailer(s), speed display trailer(s), and protection devices to accommodate ASE in the work zone. Contact the Office of Traffic and Safety Traffic Development and Support Division (OOTS TDSD) ASE program representative (410-787- 5860) at least two weeks prior to fabricating and installing ASE signs to determine exact locations for the ASE unit(s), ASE signs, workers present trailer(s), and speed display trailer(s).
104.33.02 Materials
Temporary Traffic Signs (TTS) 104.08.02 Drums for Maintenance of Traffic 104.12.02 Protection Vehicle (PV) Section 104.23 Speed Display Trailer (SDT) 104.28.02 Reflectorization 950.03 Aggregate for Maintenance of Traffic 105.02 Workers Present Trailer (WPT) 104.24.02
104.33.03 Construction
104.33.03 01 General. Refer to Standard No. MD 104.06-26B. Flexible Automated Speed
Enforcement (ASE) will be used in the work zone to enhance safety for the workers and traveling public. The Administration will provide a mobile ASE system, including speed enforcement equipment, ASE unit(s), and labor for ASE system operation. The Contractor will provide, furnish, install, maintain, relocate, and remove all the applicable ASE signing, the workers present trailer(s), the speed display trailer(s), and protection devices including the protection vehicle(s) for ASE activities as required.
104.33 Flexible Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Coordinate and cooperate with the Project Engineer and the ASE program representative to implement the ASE system on this project throughout construction. The ASE program representative is located in the Office of Traffic and Safety, Traffic Development and Support Division. Obtain approval from the ASE program representative for the ASE unit location(s), protection vehicle location(s), ASE sign locations and sizes, workers present trailer locations(s), and speed display trailer location(s). At least two weeks prior to the start of the project, arrange a field meeting with the Project Engineer and the ASE program representative to jointly identify locations for the ASE unit(s), the protection vehicle dedicated to ASE, the workers present trailer(s), and the speed display trailer(s). During the project, contact the Project Engineer and the ASE program representative a minimum of 48 hours prior to any changes not approved during the initial field meeting or due to unforeseen changes. Contact the Project Engineer and the ASE program representative a minimum of four hours before any work cancellations. Inform the Administration within 30 minutes of starting and ending work the exact start time(s) and exact end time(s) when workers are present in the work zone.
104.33.03 02 Maintenance of Traffic. Conduct maintenance of traffic as specified in 104.02.03
where required for installation, relocation, or removal of temporary traffic control devices for ASE activities.
104.33.03 03 Temporary Traffic Signs for ASE. Refer to 104.08.03. Provide automated speed
enforcement advanced warning signs on each approach to the work zone, including ramps. These signs shall consist of ASE advance notice signs and ASE speed limit signs, as shown on the plans and/or as directed by the ASE program representative. Additional ASE signs may be requested by the ASE program representative based on project needs. Prior to sign acquisition, coordinate with the Project Engineer and the ASE program representative a minimum of two weeks in advance to verify the sign types, colors of sign background and legend, materials, sizes, and locations of signs. Relocate and/or install new ASE signs as needed throughout construction.
104.33.03 04 Drums for Maintenance of Traffic. Refer to 104.12.03. When delineation of the
speed display trailer(s) or workers present trailer(s) is needed, provide 7 drums to form the shoulder taper to delineate the trailer(s) per MD 104.01-22. When the speed display trailer(s) or workers present trailer(s) is within the lane closure, additional delineation is not needed.
104.33.03 05 Protection Vehicle Dedicated to ASE Deployment. Refer to Section 104.23.
Provide a protection vehicle with a truck or trailer-truck mounted attenuator as specified in Section 104.23 dedicated to protecting each ASE unit. Coordinate placement of the protection vehicle with the ASE program representative. Position the protection vehicle prior to the arrival of the ASE operator. The protection vehicle must remain in place until the end of the automated speed enforcement and the ASE unit has left the enforcement location. Ensure that the appropriate roll ahead distance (per manufacturer’s recommendation) between the protection vehicle and the ASE unit is always maintained and access/egress for the ASE operator is provided.
104.33.03 06 Speed Display Trailer. Refer to 104.28.03. Furnish, install, maintain, relocate, and
104.33 Flexible Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS remove a speed display trailer(s) as shown on the plans and/or as directed by the ASE program representative. Construct a level area adjacent to the shoulder for placement of the speed display trailer(s) as needed. Periodically inspect the speed display trailer(s) and adjust it as needed to ensure proper function.
104.33.03 07 Aggregate for Maintenance of Traffic. Refer to 105.03. Where the ASE unit
deployment location is not on hard surface, construct a level stone entrance and pad adjacent to the roadway for the ASE enforcement unit. Provide a safe means for the ASE unit operators to enter/exit the enforcement area.
104.33.03 08 Workers Present Trailer. Refer to 104.24.03. Provide a workers present trailer(s)
(furnish, install, maintain, relocate and remove) as shown on the plans and/or as directed by the ASE program representative. Construct a level area adjacent to the shoulder for placement of the workers present trailer(s) as needed. Periodically inspect the workers present trailer(s) and make adjustments as needed to ensure proper function. Relocate and/or install additional workers present trailer(s) as needed throughout construction. Activate the flashing lights on the workers present trailer(s) when workers are present in the work zone. Deactivate the flashing lights on the workers present trailer(s) when workers are not present in the work zone.
104.33.03 09 Temporary Traffic Barrier. Refer to 104.04.03. Provide protection for the ASE
unit, either behind a temporary concrete barrier or existing W-beam.
104.33.03 10 Temporary Traffic Barrier End Treatments. Refer to 104.09.03.
104.33.03 11 Temporary Crash Cushion Sand Filled Plastic Barrels. Refer to 104.10.03.
104.33.04 Measurement and Payment
If the Automated Speed Enforcement Representative has scheduled a deployment but the Automated Speed Enforcement unit does not show up at the scheduled deployment the Contractor will still get paid as specified in this section. The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work including relocating, turning, completely covering and uncovering or removing and resetting, maintaining in like new condition, and cleaning existing and temporary traffic signs and other traffic control devices related to the operation of the Automated Speed Enforcement. The pay item will include the following items unless otherwise specified.
104.33.04 01 Temporary Traffic Signs for Automated Speed Enforcement. The signs will be
measured and paid for as specified in 104.08.04.
104.33.04 02 Drums for Maintenance of Traffic. Drums will be measured and paid for as specified
in 104.12.
104.33 Flexible Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
104.33.04 03 Protection Vehicles dedicated to Automated Speed Enforcement deployment. The
Contractor will be responsible for providing a dedicated protection vehicle for the protection of the Automated Speed Enforcement unit for the duration of the deployment shift. The protection vehicle shall be as specified in Section 104.23. Provide a licensed protection vehicle operator to drive and position the protection vehicle at the start of the deployment location and to remove the protection vehicle at the end of the shift. The protection vehicle operator does not need to remain in the vehicle for the duration of the deployment shift. The protection vehicle will be measured and paid per for per unit day. A unit day will consist of one shift of Automated Speed Enforcement deployment (not to exceed 9 hours). A deployment shift crossing midnight into the following calendar day will be paid for as one unit day (e.g., 9 PM to 5 AM counts as one unit day). The payment will be full compensation for the complete protection vehicle, including the truck mounted attenuator/trailer truck mounted attenuator and arrow panel, licensed work vehicle operator, relocating the protection vehicle, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
104.33.04 04 Speed Display Trailer. The Contractor will be responsible for the set-up, operation,
and removal/relocation of the speed display trailer(s) at the start and end of each deployment shift. The speed display trailer(s) will be measured and paid for as specified in Section 104.28.
104.33.04 05 Maintenance of Traffic. The Contractor will be responsible for providing
maintenance of traffic as specified in 104.02.03 where required for installation, relocation, or removal of temporary traffic control devices for Automated Speed Enforcement activities.
104.33.04 06 Supply of materials for installation of, and removal of pad(s) for Automated Speed
Enforcement units will be measured and paid for per 105.04.
104.33.04 07 Temporary Concrete Traffic Barrier and Reset Temporary Concrete Traffic Barrier
shall be measured and paid for as specified in 104.04.04. Reflective Barrier Markers and Vertical Panels shall be measured and paid for as specified in 104.04.04.
104.33.04 08 Temporary Traffic Barrier End Treatments, Remove and Reset Temporary Traffic
Barrier End Treatments and Repairing Temporary Traffic Barrier End Treatments will be measured and paid for as specified in 104.09.04
104.33.04 09 Temporary Crash Cushion Sand Filled Plastic Barrels shall be measured and paid for
as specified in 104.10.04.
104.33.04 10 Refusal of Payment. The Contractor will not be paid as specified in this section
under these circumstances:
a.No Automated Speed Enforcement deployment is scheduled by the Automated Speed Enforcement program representative.
b.The Automated Speed Enforcement program representative cancels a scheduled Automated Speed Enforcement deployment. The Automated Speed Enforcement
104.33 Flexible Automated Speed Enforcement
2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS representative will communicate the cancellation to the Project Engineer who will notify the Contractor a minimum of 8 hours in advance.
c.Automated Speed Enforcement deployment is cancelled prior to the scheduled time due to inclement weather. The Automated Speed Enforcement representative will communicate the cancellation to the Project Engineer who will notify the Contractor a minimum of 4 hours in advance.
d.The Contractor cancels work prior to the start of maintenance of traffic set up. The Contractor shall notify the Project Engineer and the Automated Speed Enforcement program representative of the cancellation in advance.
e.The Contractor fails to provide and comply with any of the requirements outlined and noted below in (1) through (5), then payment will be withheld for each day of nonconformance.
1.Working Speed Display Trailer.
2.All required Automated Speed Enforcement advance warning signs (properly displayed).
3.Dedicated protection vehicle for the Automated Speed Enforcement unit.
4.The Contractor fails to provide access and egress for the Automated Speed Enforcement operator.
5.Workers Present Trailer with functioning yellow beacons.
104.33.04 11 Workers Present Trailer. The Contractor will be responsible for the set-up,
operation, and removal/relocation of the workers present trailer(s) at the start and end of each deployment shift. The Workers Present Trailer(s) will be measured and paid for as specified in
Referenced in this section
Maintenance of Traffic in other states
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Source: Standard Specifications for Construction and Materials, 2026 Edition. Pages 154–245 of 1,138. View official source ↗