309 SECTION 704
704.01 Description
This work consists of furnishing, installing, and maintaining all required traffic control devices, personnel, and necessary precautions for protecting the public and workers.
704.02 Equipment
Reserved.
704.03 Materials
A.General. Provide traffic control devices that meet the standards and requirements of the MUTCD and the Standard Highway Signs and Markings Book, published by the FHWA. Provide traffic control devices that meet the following crash testing requirements: − Devices manufactured on or before December 31, 2019 must meet the requirements of any of the following: o NCHRP 350, o MASH 2009, or o MASH 2016; − Devices manufactured on or after January 1, 2020 must meet the requirements of MASH 2016. Submit a Certificate of C ompliance for all temporary traffic control materials before installation.
B.Flagging. Fabricate STOP/SLOW paddles from light, semi -rigid material with a paddle attached to a rigid handle between 5 and 8 feet in length.
C.Pilot Car. Mount the “Pilot Car Follow Me” sign on the rear of the pilot car and mount high-intensity rotating, flashing, oscillating, or strobe lights on the roof of the vehicle.
D.Sign Backing Materials. Use aluminum or plastic sign backing. Use aluminum backing that meets Section 754.04 B, “Sign Fabrication” . Process plastic backing using recommendations of the reflective sheeting manufacturer. 310 E. Reflective Sheet ing. Traffic Control Device Section Tubular Markers and Flexible Delineators Type III Section 894.02 B Barrels and Drums Type IV Section 894.02 C Cones Type VI Section 894.02 D Diamond Signs, Rectangular Signs, Square Signs, Barricades, Vertical Panels, and Stackable Panels Type XI Section 894.02 E Traffic control devices and signs fabricated before 04/01/2015 that meet the requirements of the reflective sheeting may be used until they fall into the “marginal” classification as defined by ATSSA’s Quality Guidelines for Temporary Traffic Control Devices and Features.
F.Barricades. If using aluminum rails, use aluminum that meets the requirements of ASTM Designation B 221, Alloy 6063-T6. Cover both sides of the barricade rail surface with reflective sheeting.
G.Delineator Drums. Use delineator drums that are constructed of durable plastic with horizontal, circumferential, orange and white reflectorized stripes. Weight the delineator drums or design them to be stable.
H.Stackable Vertical Panel. Use stackable vertical panels that are constructed of hollow low density polyethylene orange plastic that is held in an upright position by a molded rubber base. Provide reflective sheeting on both sides of the stackable vertical panels using the striping pattern and dimensions specified for vertical panels in the MUTCD.
I.Traffic Cones. Weight the traffic cones or design them to be stable.
J.Delineators. Equip each delineator with an acrylic plastic or reflective sheeting reflector mounted on a post support. Use delineators that meet the requirements of Section 894.04, “Delineators”.
K.Portable Precast Concrete Median Barriers. Unless the Department furnishes the barriers, provide barriers that meet the requirements of 311 L. Warning Lights. Use warning lights that are portable, lens directed and enclosed. Use warning lights that meet the requirements of MUTCD and the requirements of Table 704-01. Table 704 -01 Type A Type B Type C Low Intensity High Intensity Steady Burn Lens Directional Faces 1 or 2 1 1 or 2 Flash Rate Per Minute 55 to 75 55 to 75 Constant Flash Duration1 10% 8% Constant Min. Effective Intensity2 4.0 Candles 35 Candles Min. Beam Candle Power2 2.0 Candles Hours of Operation Sunset to Sunrise 24 hrs./day Sunset to Sunrise 1 Length of time that instantaneous intensity is equal to or greater than effective intensity. 2 These values shall be maintained within a solid angle 9 degrees on each side of the vertical axis, and 5 degrees above and below the horizontal axis.
M.Advance Warning Flashing or Sequencing Arrow Panels. Use advance warning arrow panels that meet the requirements of Table 704-02. Table 704 -02 Type Minimum Size (Inches) Minimum No. of Panel Lamps Minimum Legibility Distance1 A 24 x 48 12 1/2 Mile B 30 x 60 13 3/4 Mile C 48 x 96 15 1 Mile 1 Minimum legibility requirements are the distances at which the arrow panel message can be comprehended by a driver on a sunny day or a clear night. Provide panel faces with a black, non-reflective finish. Mount panels on a vehicle, trailer, or other suitable support with a minimum vertical clearance of 7 feet, measured from the ground to the bottom of the panel. If using vehicle mounted panels, equip the panels with remote control capabilities. Equip arrow panels with one of the following mode selections: − Left or right flashing or sequencing arrows and double flashing arrows; or − Left or right sequencing chevrons and caution. Provide automatic light dimming controls capable of reducing rated lamp voltage a minimum of 50 percent on each arrow panel. Control the dimming with a photoelectric cell that operates between sunset and sunrise. Use arrow panel lamps that flash at a rate between 25 and 40 flashes per minute. Use lamps that have a minimum “on” time of 50 percent for the flashing arrow and 25 percent for the sequential chevron. 312 Recess mount the arrow panel lamps or lenses or equip them with an upper hood of not less than 180 degrees. Use lamps that emit yellow light.
704.04 Construction Requirements
A.General.
1.Requirements Before Device Installation. Before beginning work, coordinate and hold a meeting with the Engineer to review the traffic control plans.
2.Placement. If the placement of work zone signs interferes with permanent signs or an obstruction makes the required location impractical, place the work zone signs at an approved location. Revise the sign messages if necessary. Place traffic control devi ces to meet the standards and requirements of the MUTCD and the Standard Highway Signs and Markings Book, published by the FHWA. Do not lean the sign face or sign supports on sign anchors. Install the sign supports and face or mark the anchors so that they are visible. Only place traffic control devices that are applicable to actual conditions of the project site. Remove devices once they are no longer necessary. Remove sign bases at the same time that sign faces are removed. Have all required devices available for installation when needed. Maintain, relocate, cover, or remove devices as necessary. Install and maintain devices so that they function in the manner that they were crash tested.
3.Traffic Control Maintenance and Revisions. When the Engineer notifies the Contractor, Traffic Control Supervisor, Watchperson, or Traffic Signal Maintenance Person of the need for traffic control to be furnished, installed, relocated, maintained, removed, or otherwise revised; the Contr actor, Traffic Control Supervisor, Watchperson, or Traffic Signal Maintenance Person must be on the project addressing the issue within one hour of the notification. If additional resources or time are needed, the Engineer and the traffic control personnel on site will agree on an action plan and a time for completion. If the the action plan is not executed or the the Contractor fails to meet the time for completion, the Engineer will take the action detailed in this section. If the Engineer issues notifi cation of the need for traffic control to be furnished, installed, relocated, maintained, removed, or otherwise revised and the Contractor, Traffic Control Supervisor, or Watchperson fail to comply, the Engineer will perform any combination of the following:
1.The Engineer will apply a contract price reduction of $1,000 if the Contractor, Traffic Control Supervisor, or Watchperson is not on the project addressing the issue within one hour. 313 2. The Engineer will apply a contract price reduction of $1,000 per day.
3.The Engineer will have the work completed by other means, without additional notification, and deduct the cost of the work from monies due or to become due the Contractor.
4.The Engineer will direct all other work to cease until the deficiencies have been corrected.
B.Traffic Control Device Condition Classifications. Classify traffic control devices according to ATSSA’s Quality Guidelines for Temporary Traffic Control Devices and Features , using the designations “acceptable”, “marginal”, and “unacceptable” .
1.Initial installation of Traffic Control Devices. If traffic control devices are to remain the property of the Contractor upon project completion, provide devices that are classified as “acceptable” at the time of installation. If traffic control devices are to remain the Department’s property upon project completion, the devices must be new at the time of installation and must be classified as “acceptable” when the Department takes pos session. If devices are not classified as “acceptable” when the Department takes possession, provide identical devices that meet the “acceptable” designation at no additional cost to the Department.
2.Replacement of Traffic Control Devices. For each type of device used, except warning lights, a maximum of 25 percent of the quantity may fall into the “marginal” classification during the course of the work. Replace devices as needed so that at least 75 percent of the devices remain classified as “acceptable”. Replace any devices that become classified as “unacceptable”. Install replacement devices that are classified as “acceptable” within 24 hours of discovering that the previously installed device falls below the specified classification limit. Replace devices not covered by ATSSA’s Quality Guidelines for Temporary Traffic Control Devices and Features when they are no longer in an operable condition. Clean traffic control devices as necessary to maintain the proper brightness of reflectorized material or warning lights.
C.Personnel. The traffic control supervisor and traffic signal maintenance person shall be able to access the project site within one hour of notification and be “on call” on a 24 hour basis.
1.Traffic Control Supervisor. If designated in the plans, provide a traffic control supervisor. If the designated traffic control supervisor becomes unavailable, designate a replacement supervisor.
a.Qualifications. Designate a traffic control supervisor that:
1.Has completed a traffic control course as outlined in Control Course” . 314 2. Is familiar with the requirements of the Department traffic control plans and specifications.
3.Has a total of at least 12 months experience with traffic control plans, layouts and maintenance.
4.Is competent to supervise personnel in traffic control operations.
b.Duties. The traffic control supervisor shall:
1.Provide traffic control as required
2.Perform and document a daily inspection of the installation, operation, maintenance, and removal of all traffic control devices. Submit copies of the daily inspection documents on a weekly basis.
3.Correct traffic control conditions that cause erratic vehicle movements, unexpected braking, etc.
4.Propose changes to improve traffic flow through the work zone.
c.Traffic Control Course. A 16 hour minimum traffic control course shall be one of the following: − ATSSA Traffic Control Supervisor Course; − AGC Traffic Control Supervisor Course; − NHI’s Design and Operation of Work Zone Traffic Control, course number 133112A ; or − Approved subject courses with a minimum of 3 hour per subject of the following(combined total must be at least 16 hours): • Manual and standard signs used in work areas; • Channelizing devices and temporary barriers, pavement markings, lighting devices, arrow displays and spec ial devices, and devices location and placement; • Layout for traffic control devices, motorist characteristics, and options and alternatives; • Installation and removal of the traffic control zone, and operation and maintenance of the traffic control zone; and • Flagging operations, legal liability and record keeping, and emergency situations. Each course or subject course shall include a workshop covering: − Designing traffic control; − Installation and removal; and − Operations and maintenance. Each workshop shal l also include a question and answer portion. A valid Minnesota Department of Transportation Traffic Control Supervisor Certification will be accepted in lieu of traffic control courses listed above.
2.Watchperson. Provide a watchperson that patrols the project to ensure that the traffic control devices are properly placed. If the plans specify a traffic control supervisor, the traffic control supervisor may be designated as the watchperson. 315 On days when work is in progress, the watchperson shall patrol the project at least three times per day, with a minimum of 6 hours between inspections. On days when no work is in progress the watchperson shall patrol the project twice per day, once each morning and once each evening before sunset. The watchperson shall perform at least one inspection per week after dark. If work is being performed 24 hours a day, the watchperson shall patrol the project every 8 hours. The watchperson shall perform and document a daily inspection of the work that they perform. Submit a copy of the daily inspection documentation and watchperson’s hours on a weekly basis. Immediately assist the watchperson to correct conditions that cause erratic traffic movement, unexpected braking, etc., and erect, repair, replace, or relocate the required traffic control devices. The Engineer may allow suspension of watchperson service during periods of authorized suspension of work or after substantial completion of the work.
3.Traffic Signal Maintenance Person. If permanent or temporary traffic signals are being installed, designate a traffic signal maintenance person. This person is in addition to the traffic control supervisor and the watchperson as specified in Sections 7 04.04 C.1, “Traffic Control Supervisor” and 704.04
C.2, “Watchperson” . The Engineer may allow the traffic control supervisor to perform the responsibilities of the traffic signal maintenance person provided that they hav e the appropriate training or experience. The traffic signal maintenance person shall be responsible for maintenance of interim and permanent traffic signals.
4.Emergency Contact Information. Provide written documentation to the Engineer, Highway Patrol , 911 Coordinator, and local law enforcement agencies of the name, address, and phone number of the: − Superintendent as outlined in Section 105.02, “Contractor Requirements” ; − Traffic Control Supervisor as outlined in Section 704.04 C.1, “Traffic Control Supervisor” ; − Watchperson as outlined in Section 704.04 C.2, “Watchperson” ; and − Traffic Signal Maintenance Person as outlined in Section 704.04 C.3, “Traffic Signal Maintenance Person” . If any of the listed personnel change, provide written notification containing the new name, address, and phone number to the Engineer , Highway Patrol, 911 Coordinator, and local law enforcement agencies, within 24 hours of the change. 316 5. Flaggers. Before individuals will be allowed to perform flagging, the Engineer must receive written verification that the flaggers provided for the pr oject have passed the written examination found at http://www.ndsc.org /. Furnish each flagger with the North Dakota Flagging Handbook. E nsure each flagger observes the rules and regulations contained in the North Dakota Flagging Handbook . If there are any differences between the requirements in the handbook and specifications, the specifications will govern over the handbook. The handbook is available for download at www.ndltap.org and at http://www.ndsc.org /. Do not assign flaggers other duties while working as authorized flaggers. If flagging is performed after sunset, provide each flagger with a flashlight topped with a transparent red glow cone and a reflectorized STOP/SLOW paddle. Illuminate the flagger’s location using floodlights as specified in Section 704.04 K.6, “Floodlights” .
6.Pilot Car. Use a pilot car to guide vehicles through or around the construction area when traffic is reduced to a single lane. At each end of the single lane section, coordinate the pilot car operation with flaggers.
D.Signing.
1.Project Terminal Signing. Before starting work, erect the required traffic control devices at each end of the project and at intersecting roadways shown on plans. Leave these devices in place and maintain them for the duration of their use.
2.Work Area Signing. Do not start construction work until the proper traffic control devices for the work area are in place. If no details are provided for the particular type of construction work involved, install traffic control devices according to the MUTCD or as directed by the Engineer. If additional signing is required due to Contractor operations: − Furnish flaggers at no additional cost to the Department until the additional signs are installed ; or − Cease construction operations in that area until the additional signs are installed. Relocate, remove, or change traffic control devices so that the devices match the actual conditions of the project site. When no work is in progress, completely cover or remove signs that are only necessary when work is being performed. Ensure all portable sign mounts that are in place longer than 24 hours or in place after sunset are perpendicular to the ground. If portable signs are trailer mounted, use trailers that meet the crash test requirements of NCHRP Report 350 or MASH. 317 Place portable signs on the shoulder or outside of the traveled lane without posing a hazard to traffic and in clear view of oncoming traffic without sight obstructions. When portable signs are not in use: − Move the signs a minimum of 60 feet from the edge of the traveled lane and place so that the message cannot be read by traffic; or − Lay the signs face down on the foreslope. Only lay signs on the foreslope if the laydown height is 6 inches or less.
3.Existing Signs. Reset existing traffic signs that are moved to accommodate construction activities.
4.Route Markers. The Department will furnish necessary route marker signs. Furnish all necessary hardware to install the Department furnished signs. Install the Department furnished route marker signs on Contractor furnished posts.
E.Barricade and Vertical Panel Application.
1.General. Barricade rails and vertical panels with stripes that begin in the upper right corner and slope down and to the left are “right” devices. Install “right” devices on the right side of a traffic lane. Barricade rails and panels with stripes that begin in the upper left corner and slope down and to the right are “left” devices. Install “left” devices only on the left side of a traffic lane.
2.Barricades. Use Type I or Type II barricades to mark a specific hazard or to channelize traffic. If using Type I or Type II barricades to channelize traffic, install barri cades so that they face the oncoming traffic. When closing a section of road, install Type III barricades at the points of closure. Extend the Type III barricades completely across the roadway including the shoulders or from curb to curb. If access for equipment and authorized vehicles is necessary, use Type III barricades with gates or movable sections that can be closed when work is not in progress, or with indirect openings that discourages public entry. If the road is closed, but access to local traffic must be furnished, arrange the Type III barricades to permit local traffic only. Do not use Type III barricades to channelize traffic. If the construction limits encroach onto pedestrian routes and the pedestrian traffic cannot be diverted to other existing pedestrian routes, install Type III barricades to define the temporary pedestrian access. 318 3. Vertical Panel – Back to Back. Use vertical panels that are faced on both sides as channelizing devices, warning devices, or windrow markers.
4.Stackable Vertical Panel. Use stackable vertical panel to channelize traffic.
F.Drum Application. Use drums to channelize or delineate traffic flow or to mark specific hazards.
G.Traffic Cone and Tubular Marker Application. Use traffic cones and tubular markers to channelize traffic. Use additional weighting as required to prevent overturning or displacement.
H.Flexible Delineator Application. If using a two-sided delineator, keep the wide side of the delineator toward traffic. If the delineator is to be seen by side traffic, use an additional delineator with its wide side placed facing the side traffic. The Engineer will not measure the additional delineator for payment.
I.Delineator Application. Use delineators within project site for traffic guidance. Do not use delineators as warning devices. Mount delineators on supports so the reflector is 4 feet above the roadway edge. Use white reflectors for delineators installed along the right side of the road. Use yellow reflectors for delineators installed along the left edge of divided streets, divided highways, and one-way roads. Along roadway curves, space delineators as specified in the MUTCD.
J.Precast Concrete Median Barrier (State Furnished).
1.Pickup. At least two weeks before taking control of State furnished barriers; notify the Engineer of the date that control will be taken. Notify the Engineer 24 hours in advance to verify the time of pickup. Before taking control of the barriers, perform an inventor y of all barriers and associated materials to be received with the Engineer, and document the results. Both parties must sign and date the inventory. Each party must retain a signed copy of the inventory. Provide necessary equipment to load and secure the barriers.
2.Return. At least two weeks before transporting barriers to the designated storage location, notify the Engineer of the transportation date. Notify the Engineer 24 hours in advance to verify the time of return. When returning, stack barriers on 4 inch by 4 inch boards on the ground and in between stacked rows of barriers. 319 At the time of storage, place a connecting bolt assembly, including two washers and a nut, through the barrier loop on each barrier. Thread the nut onto to the bolt a suffi cient distance to secure the bolt assembly to the barrier during transport. After completing delivery, perform an inventory of the barriers and associated materials with the Engineer, and document the results. Replace any barriers or materials that have been damaged or lost at no additional cost to the Department. After any replacement items have been delivered, the Engineer and the Contractor will sign and date the inventory and both parties will retain a copy. Provide necessary equipment to unload the barriers.
3.Barrier Markers. Replace missing barrier markers on the State furnished barriers before allowing two way traffic and throughout the usage of the barriers.
K.Lighting Device Application.
1.Flashing Lights (Type A, Low -Intensity). Use Type A low -intensity flashers to warn drivers that they are approaching or traveling in a hazardous area.
2.Flashing Lights (Type B, High-Intensity). Use high-intensity flashers at extremely hazardous site conditions. Operate the high- intensity flashers 24 hours per day.
3.Steady-Burn Lights (Type C). Use steady -burn warning lights to delineate the edges of the traveled way on detour curves, on lane changes, and along tapers.
4.Mounting Height of Warning Lights. Mount warning lights on:
a.Barricade and portable barriers with a minimum height of 36 inches from the bottom of the lens to the roadway.
b.Signs with the bottom of the light housing between 2 and 12 inches above the top of the sign.
c.Vertical channelizing devices and independent supports between 4 and 5 feet above the pavement.
5.Sequencing Arrow Panels. During nighttime operations, use an automatic dimmer on the lamps to dim them to 50 percent of the output.
6.Floodlights. If construction activities are performed at night, provide floodlighting for the construction area, inspection area, and flagger stations. Adequately illuminate the area without creating glare in the eyes of drivers. 320 L. Attenuation Devices. In addition to the modules for layouts as required in the plans, provide additional replacement modules for each layout location, up to a maximum of 20 modules per contract. Place the replacement modules at a location acceptable to the Engineer. Maintain the modules in each layout. Replace any damaged modules. If the replacement modules are installed, have additional replacement modules available within 3 calendar days.
M.Protection Vehicle with Truck Mounted Attenuation Device (TMA). Provide a protection vehicle with a truck mounted attenuation device to protect personnel and equipment from damage during mobile operations. Use truck -mounted attenuation devices that meet the test requirements of NCHRP Report 350 or MASH test level TL-3 . Use a protection vehicle equipped with a TMA. Use a protection vehicle that is of a weight recommended by the manufacturer of the TMA. Equip the protection vehicle with an advance warning flashing or sequencing arrow panel conforming to Section 704.03 M, “Advance Warning Flasher or Sequencing Arrow Panel” and the MUTCD.
N.Obliteration of Pavement Marking.
1.Removal. Remove existing markings and place the new delineation before opening the affected lane or lanes to traffic. Do not permanently damage the surface or texture of the pavement when removing pavement markings. Where blast cleaning is used for removal of markings immediately remove the blast material from the pavement.
2.Masking. Masking of existing pavement markings will be allowed when indicated in the plans and will allow the option of masking or require the use of masking. When masking is used, overlap the masking over the existing marking by 1 inch on each side. Mask markings using paint or tape. Mix paint so as to closely approximate the color of the in-place pavement. Use removable, non-reflective, preformed tape that minimizes contrast with the pavement.
O.Traffic Control for Uneven Pavement.
1.General. If pavement in adjacent lanes or the shoulder adjacent to an open lane is uneven at the completion of a day’s work, install traffic control devices as specified in this section. Leave these devices in place until the pavement surface in the adjacent lanes or shoulder are even.
2.Two Lane Roadways. Install an “Uneven Lanes” sign (Sign W8-11-48) and a supplementary plaque identifying the length of the uneven pavement (Sign W20- 52-54). Place this assembly on the right shoulder, in both directions, in advance of the uneven pavement. Between the “Uneven Lanes” sign and the beginning of the uneven pavement, install a “Do Not Pass” sign (Sign R4-1 -48) on the right shoulder in both directions. Install “Uneven Lanes” signs and a supplementary plaque identifying the length of the uneven pavement at the following intersections: − County Major Collectors; − State Highways; − US Highways; and − Interstate Ramps. Install tubular markers spaced at 2 times the posted speed limit through the uneven pavement area.
3.Multilane Roadways.
a.Uneven Pavem ent 2 Inches or Less. Install an “Uneven Lanes” sign (Sign W8-11-48) and a supplementary plaque identifying the length of the uneven pavement (Sign W20-52-54). Place this assembly on the right shoulder, in advance of the uneven pavement. Install “Uneven Lanes” signs and a supplementary plaque identifying the length of the uneven pavement at the following intersections: − County Major Collectors; − State Highways; − US Highways; and − Interstate Ramps.
b.Uneven Pavement Greater Than 2 Inches. Install an “Uneven Lanes” sign (Sign W8-11-48) and a supplementary plaque identifying the length of the uneven pavement (Sign W20-52-54). Place this assembly on the right shoulder, in advance of the uneven pavement. Between the “Uneven Lanes” sign and the beginning of the uneven pavement, install a “Do Not Pass” sign (Sign R4-1 -48) on the right shoulder. Install “Uneven Lanes” signs and a supplementary plaque identifying the length of the uneven pavement at the following intersections: − County Major Collec tors; − State Highways; − US Highways; and − Interstate Ramps. Install tubular markers spaced at 2 times the posted speed limit through the uneven pavement area.
4.Uneven Shoulder and Adjacent Lane. If the shoulder and adjacent driving lane are not even at the end of the day, the following criteria will apply: Install “Shoulder Drop Off” signs (Sign W8-9a-48) at the following locations: − In advance of the drop off; − Spaced at each mile from the advance sign; and − At major intersections (CMC routes, state and U S highways, and Interstate ramps). If the difference in elevation between the shoulder and the driving lane is 2” or greater, construct a slough at the edge of the driving lane that is 4:1 or flatter. If the difference in elevation between the shoulder and the driving lane is less than 2”, no slough is required.
704.05 Method of Measurement
The Engineer will measure as specified in Section 109.01, “Measurement of Quantities” and as follows: The Engineer will only measure traffic control devices that wer e authorized by the Engineer before their installation. The Engineer may authorize but will not measure devices beyond the quantity included in the plans that become necessary due to the Contractor’s methods or work sequence. This includes instances where the type of operation is included in the work area layouts included in the plans.
704.06 Basis of Payment
A.General. The Engineer will pay for the maximum required number of each type of device used at one time. The Engineer will not pay for the reuse, relocation, and replacement of devices. If an Engineer order or a contract revision necessitates the relocation of signs mounted on fixed supports, the Engineer will determine the number of sign units that were relocated and the Department will pay the Contractor for 50 percent of those units at the contract unit price as payment for the relocation. The Department will not make payment for any existing traffic control devices that are turned away, covered, taken temporarily out of service, and then returned to use. The Department will not make payment for any traffic control devices relocated as required by construction operations. Pay Item Pay Unit Flagging Man Hour Traffic Control Sign Unit Attenuation Device – Type B - __ Each Type __ Barricade Each Delineator Drums Each Traffic Cones Each 323 Pay Item Pay Unit Tubular Markers Each Delineator Each Flexible Delineators Each Stackable Vertical Panels Each Vertical Panels – Back to Back Each Sequencing Arrow Panel – Type __ Each Traffic Control Lump Sum Pilot Car Hour Portable Precast Concrete Median Barrier Linear Foot Portable Precast Concrete Median Barrier – State Furnished Each Portable Changeable Message Sign Each Obliteration of Pavement Marking Square Foot Such payment is full compensation for furnishing all materials, equipment, labor, and incidentals to complete the work as specified.
B.Lump Sum Traffic Control. If traffic control is included in the contract as a lump sum, the Department will make payment equal to: − 50 percent of the unit price at the time the traffic control is installed; − 25 percent of the unit price when the contract is 50 percent complete; and − The remaining 25 percent of the unit price when the traffic control is removed from the project.
C.Nonstandard Signs. A nonstandard sign is defined as a sign that is unique to a project specific situation. If the Contractor is required to furnish a nonstandard sign that was not included in the Contract, the Engineer will make payment at invoice price plus 15 percent.
D.Precast Concrete Median Barrier (State Furnished). The Department will make payment for Precast Concrete Median Barrier (State furnished) as follows: − 50 percent of the contract unit price will be paid when the barriers have been placed on the project site. − The remaining 50 percent of the contract unit price will be paid when the barriers have been removed from the project, transported to the storage area designated in the Contract and accepted by the Engineer with all applicable hardware ac counted for in the Contractor provided written inventory. Include the cost of obtaining, transporting, installing, moving, and maintaining the barriers in the contract unit price for “Portable Precast Concrete Barriers – State Furnished”.
E.Attenuation Devices. The Department will make payment for "Attenuation Devices Type B" by the number of arrays installed. 324 The Department will reimburse the Contractor for damaged modules based on module invoice price plus 10 percent. Section 706 325 SECTION 706 LABORATORIES
706.01 Description
This work consists of furnishing and placing a field laboratory.
706.02 Equipment
A.General. Provide a level, fully insulated, and weather tight building Equip the exterior doors with a working latch and a hasp that is capable of receiving a padlock. Provide a laboratory that has the following:
1.A minimum of six screened windows on two or more sides, with a minimum of one window in each room. Windows shall have a minimum area of 4 square feet;
2.A constant source of electricity;
3.A minimum of 6 convenience outlets spaced throughout the building;
4.Sufficient light fixtures to uniformly light the interior;
5.A constant potable water supply with a minimum pressure of 5 psi or a minimum head of 12 feet when a gravity tank is used;
6.A faucet and sink. The sink shall drain to the exterior and away from the laboratory;
7.A heating system capable of maintaining a minimum temperature of 70°F;
8.An air conditioning system capable of maintaining a temperature below 80°F;
9.An operable portable fire extinguisher capable of controlling Class A, B, and C fires in each room of the laboratory;
10.Entry steps with a 4 feet x 4 feet landing that meet the following: − A non-slip surface; − Securely fastened to the building; − Position the landing so a person carrying a load can stand on the platform and safely enter the laboratory; and − A safety railing.
11.Workbenches shall be: − Sturdy; − A minimum of 24 inches deep; and − 36 inches to 42 inches above the floor.
12.A Microwave with a minimum of 900 Watts of power, 1 cubic foot of interior space, and a removable glass tray;
13.30 inch range with an oven capable of maintaining a temperature between 221°F and 239°F;
14.A chair; and
15.A table or desk. Furnish Aggregate and Bituminous labs with DSL broadband internet and a router that broadcasts Wi -Fi and will allow for hard wiring of a computer. The building and fixtures remain the property of the Contractor after the work is completed.
Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 344–359 of 550.