SECTION 840: SIGN SUPPORTS DESCRIPTION 840.20: General The work to be done hereunder consists of the erection and fabrication of steel structural supports on 4,000 psi cement concrete foundations. The Contractor may select any structural sign support system meeting the design criteria of the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals . Acceptance of the structural sign supports system will be contingent upon the review and approval of Shop Drawing submitted by the Contractor. The foundations and supports for ground mounted signs shall be based on the plans and the standard drawings. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.423 202 4 Edition The design for overhead structures and foundations shall conform to the requirements of 828.21: Plans . Boring samples or actual determination of soil properties are required for all footings for overhead structures. All unsuitable material within the limits of the footing must be removed at the direction of the Engineer. (Peat, organic material, material that has been dumped. etc.). The concrete for the footing shall be placed immediately after excavation to prevent water from collecting in the excavated area. All overhead and cantilever sign support structures shall be designed so as to be supported by single poles or end frames having not more than 2 vertical main members. All overhead and cantilever sign structures shall have as an integral part of the structure, a Department approved damping device, which shall be installed during erection of the structure. The damping devices shall be installed as follows: • Overhead structures shall have the damping devices installed at the midpoint of the span (±1 ft), regardless of sign panel location. • Two -chord structures shall have the damper attached to the top chord at mid -span. • Tri-chord structures shall have the damper attached to the middle chord at mid -span. • Box truss structures shall have the damper attached to the rear top chord at mid -span. • Cantilever structures shall have the damper attached to the outer end of the horizontal member. The approximate locations for the new signs are shown on the plans, the exact locations are to be determined by the Engineer on the project. The Department will mark or stake the center point for each sign foundation only once whereupon it shall be the responsibility of the Contractor to furnish and set at their own expense all tie and construction stakes necessary for the erection of the sign. All measurements to fabricate and erect the overhead sign structures and supports for ground mounted signs shall be made by the Contractor. Field measurements needed to determine the exact span and height of each structure should be taken immediately upon award of the Contract for incorporation in the structural layout on the shop drawings prior to submission for review. The Contractor shall submit all design work, together with hand or computerized calculations and plans used for design purposes, to the Department; which shall become property of the Department with no additional compensation. All design work shall bear th e seal of a Professional Engineer registered in Massachusetts. Certificates of compliance shall conform to the requirements of Subsection 6.01: Source of Supply and Quality . Before fabricating the sign support structures, the Contractor shall submit erection plans and shop drawings for approval of the Engineer. Shop drawings shall be in accordance with 960.60: Shop Drawings and Subsection 5.02: Plans and Detail Drawings and include span lengths, post heights, vertical and horizontal clearances, material Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.424 202 4 Edition specifications (grade and/or alloy), anchor bolt layout, and any other pertinent information. Provisions for cambering shall also be shown to ensure that horizontal cross beams will not deflect below the horizontal. Erection procedures shall be in accordance with 960.61: Design, Fabrication and Erection . A 4-in. x 6.5 -in. handhole (minimum size) with frame and cover shall be installed in each overhead support structure post and positioned approximately 12 in . above the top of footing. The frames and covers shall be the same material as the posts. A removable cap with set screws shall be furnished on the top of each overhead suppo rt struc ture post. All supports for ground mounted signs shall be of the “ Breakaway ” type. The design, fabrication and erection shall conform with the plans. The work to be done hereunder shall include the furnishing and installation of Breakaway Post Assemblies for ground mounted signs, (not guide), in accordance with Depart ment Standard Drawings and as shown on the plans. This specification covers the use of standard, tapered, square, rectangular, round and special shape structural metals for sign supports. Breakaway Sign Supports shall be designed and fabricated in conformance with plans titled "Standard Ground Mounted Supports Breakaway Design. ” All vertical suppo rts shall be erected plumb. Both ends of each truss spanning a roadway shall be set at the same elevation. Sign panels shall be mounted symmetrically about the horizontal truss or beam and provide a minimum vertical clearance above the roadway surface as shown on the plans. MATERIALS 840.30: General All materials shall be new and shall meet the requirements specified in the following Subsections of
Division III — , Materials:
4,000 psi Cement Concrete ...................................................................................................... M4.02.00 Reinforcing Steel .......................................................................................................................... M8.01.0 Anchor Bolts .................................................................................................................................. M8.01.5 Sign Supports ................................................................................................................................ M8.18. 3 All overhead and cantilevered support structures shall be in accordance with the requirements of Subsection 960: Structural Steel and Miscellaneous Metal Products . FABRICATION 840.40: General Welding shall conform to the applicable provisions of 960.61: Design, Fabrication and Erection. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.425 202 4 Edition No transverse welds will be permitted in the tubular shafts, except at the base plate and flange plate connections or where reinforcing sleeves are required. The shaft shall telescope the flange and the base plate and be welded by two continuous welds, one on the inside of the plate at the end of the shaft and the other on the outside surface of the plate. All welds shall develop the full strength of the section at the point of connection. CONSTRUCTION METHODS 840.60: General Work hereunder includes excavation, reinforcing steel, 4,000 psi cement concrete, anchor bolts, backfilling, grading and all other labor, material and equipment required to construct foundations conforming to the details shown on the plans and as directed. Single pole foundation holes, except in ledge, shall be excavated by the auger method to the neat lines of the outside dimensions of the footings without disturbing the soil around or below the proposed footing. In areas where rock or ledge is encountered the bottom of the footing shall be placed to the design depth shown on the typical detail plan. Concrete for footings where rock has been excavated, shall fill the entire volume of the excavation to the full dept h of footing as designed. Concrete foundations shall be poured monolithically to grade, except that where the foundation requires a spread footing it may be poured separately, and the pedestal then poured to grade. The lower portion of the footing may be poured separately, and the pedestal then poured to grade. The lower portion of the footing may be poured against the embankment, but the top 6 in . below finished grade shall be formed. Anchor bolts shall be set to conform with the base -plate template as furnished in conformance with the typical detail plans. The top of the foundation shall be properly finished and dressed to assure that full bearing will be provided on the leveling nuts which are to be set in concrete. All exposed edges shall have a ½- in. chamfer. Drain grooves shall be provided as shown on the typical plans. Backfill for foundations, if required by the Engineer, shall be gravel borrow conforming to the requirements of M1.03.0: Gravel Borrow, except that no stone having any dimension greater than 1.25 in . shall be allowed. The gravel shall be placed in layers not exceeding 6 in . in depth before compaction. Each layer of backfill shall be thoroughly compacted by use of power tampers to a minimum 95% density. All backfilling and compaction shall be in accordance with the applicable provisions of 150.64: Backfilling for Structures and Pipes . P-5 posts may be either the square tube post or U channel type at the Contractor’s option. Signs mounted with square tube posts shall be installed as follows: Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.426 202 4 Edition Table 840. 1: Sign Face Size Limitations for P- 5 Square Tube Posts Area (ft²) Mounting with P -5 Square Tube Posts ≤7.5 Single 2 .25-in. x 2.25- in. Post >7.5 but ≤15 Two 2.25- in. x 2.25- in. Posts >15 but ≤20 Two 2.5- in. x 2.5-in, Posts Single post installation shall be in accordance with the Standard Drawing and Signs and Supports. Signs with two posts require a slip base and shall be installed as per manufacturer's recommendations except that the sign post anchor shall be embedded at least 4 ft below ground surface. Signs mounted with U -channel posts shall be installed as follows: Table 840.2: Sign Face Size Limitations for P -5 U-Channel Posts Area (ft²) Mounting with P -5 U-Channel Posts ≤10 Single Post >10 but ≤200 Two Posts Breakaway capabilities shall be maintained via the use of a lap splice or slip base system. Signs with two posts shall be installed as per manufacturer's specifications except that the sign post anchor shall be embedded at least 4 ft below ground surface. Damage to the galvanized coating shall be repaired before erection with high zinc dust content paint meeting M7.04.11. COMPENSATION 840.80: Method of Measurement Payment items in the 841.* series, and payment items 845.1* through 848.1* will be measured by each. Payment Items 840.1* and 844.1* will be measured by lump sum. 840.81: Basis of Payment Payment items in the 840.* through 848.* series will be paid for at the contract unit price, which price shall be full compensation for design and construction of the completed structure including all excavation, gravel backfill and compaction. Rock excavation when encountered shall be paid under Class B Rock Excavation. Breakaway P -5 Post Assembly, single or double, shall be considered as one unit. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.427 202 4 Edition 840.82: Payment Items 840.1 * Support for Overhead Guide Sign (OD -*) – Steel ............................................ Lump Sum 841.1 Support for Guide Sign (D6 with D8 – 5- Inch Tubular Post) Steel .......... Each 841.2 Support for Guide Sign (D6 – 5 Inch Tubular Post) Steel ............................ Each 841.3 Support for Guide Sign (D6 – P5 Posts) Steel ................................................... Each 841.4 Support for Guide Sign (D8 – 4 Inch Tubular Post) Steel ............................ Each 841.5 Support for Guide Sign (D8 – P5 Posts) Steel ................................................... Each 841.6 Support for Guide Sign (I -2A – 5 Inch Tubular Post) Steel ......................... Each 841.7 Support for Guide Sign (D6 with D8 – Special Design) Steel ...................... Each 841.8 Support for Guide Sign (D6 – Special Design) Steel ....................................... Each 844.1 * Support for Guide Sign (G*) Steel Lump ............................................................. Lump Sum 845.1 Support for Guide Sign (E5 -1) Steel ..................................................................... Each 846.1 Supports for Guide Sign (E5- 1A) Steel ................................................................ Each 847.1 Sign Support (Not Guide) and Route Marker with 1 Breakaway Post Assembly – Steel ................................................................................................. Each 848.1 Sign Support (Not Guide) and Route Marker with 2 Breakaway Post Assemblies – Steel ............................................................................................. Each * = as per Department Standard Nomenclature SUBSECTION 850: TRAFFIC CONTROLS FOR CONSTRUCTION AND MAINTENANCE OPERATIONS DESCRIPTION 850.20: General Work under this Section consists of furnishing, installing and maintaining in proper operating condition various traffic control devices for the protection of the traveling public and working personnel during construction and maintenance operations. The de sign, application, and installation of all devices shall conform to MassDOT’s “Standard Details and Drawings for the Development of Temporary Traffic Control Plans” and the MUTCD, and/or as directed. The Contractor shall be responsible for the installation of adequate safety precautions for the protection of the traveling public and all project personnel. All construction vehicles not protected by any form of traffic control device on a project which is open to traffic shall have an amber flashing light mounted on the cab roof or on the highest practical point of the machinery. The light shall be in operation whenever the equipment is working on the highway or travelway. Amber flashers must be a minimum of 40 cd and have a flashing frequency of 50 to 60 times per minute. Either rotating beacons or strobe lights meeting these requirements are acceptable. All materials provided by the Contractor under the items of this section shall remain the property of the Contractor upon completion of the project. All work under this Section shall conform to the approved Temporary Traffic Control Plan. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.428 202 4 Edition 850.21: Roadway Flagger The Contractor shall provide the number of flaggers required in either the approved TTCP or that the Engineer deems necessary for the direction and control of traffic within the site. A flagger shall be used as directed by the Engineer in accordance with 70 0 CMR 6.00, this section, and the TTCP. Any flagger determined by the Engineer to be ineffective in controlling traffic may be removed at the discretion of the Engineer. If a flagger is directed to be removed, the Contractor shall immediately comply with the directive from the Engineer and shall suspend operations as necessary until a qualified replacement can be provided. Such a suspension of operations shall not be considered as a basis for a claim or an extension of time. MassDOT reserves the right to provide certified Roadway Flaggers or police officers, at the discretion of the Engineer. 850.22: Traffic Cones for Traffic Management Traffic Cones for Traffic Management consists of furnishing, positioning, repositioning, maintaining and removing, as needed and/or as directed, traffic cones and necessary ballast for the purpose of closing a lane, shifting traffic, channelizing, or other wise redirecting traffic. 850.23: Safety Signing for Traffic Management Safety Signing for Traffic Management consists of furnishing, positioning, repositioning, covering and uncovering, maintaining and removing, as needed and/or as directed: regulatory, warning, and guide signs together with their supports. If additional supp orts are needed due to site conditions they will be considered incidental to the work. Signs over 50 ft ² will require approval of design calculations and shop drawings of the breakaway support system if the signs are installed at an unprotected location. 850.24: Temporary Pavement Markings and Temporary Raised Pavement Markers Temporary Pavement Markings and Temporary Raised Pavement Markers consist of furnishing, applying, maintaining and removing temporary white and yellow reflectorized pavement markings and temporary raised pavement markers during construction and maintenance operations. Temporary markings shall be effective for a period of 90 days. Re- application or replacement within the 90 -day period shall be done at no additional cost to the Department. 850.25: Arrow Board Arrow Board consists of providing, operating, positioning, repositioning, maintaining and removing a portable truck -mounted or trailer -mounted flashing arrow unit on the project at designated locations. 850.26: Reflectorized Drums Reflectorized Drums consists of furnishing, positioning, repositioning, maintaining, and removing reflectorized plastic drums and necessary ballast, as needed and/or as directed by the Engineer. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.429 202 4 Edition 850.27: Pavement Marking Removal and Raised Pavement Marker Removal Pavement Marking Removal consists of removing existing pavement markings as required to support the Temporary Traffic Control Plan and as directed by the Engineer. Raised Pavement Marker Removal consists of removal and disposal of the existing raised pavement markers including filling the void. 850.29: Temporary Barrier and Temporary Barrier Removed and Reset Temporary Barrier consists of furnishing, installing, maintaining and final removal of temporary barriers, including delineation, for traffic control or work zone protection in construction zones. Temporary Barrier Removed and Reset consists of removing, transporting and resetting of temporary barrier units from alignments established along the roadway to new alignments as required by the construction and staged construction operations for the control of traffic or work zone protection. 850.31: Portable Breakaway Barricades Type III Portable Breakaway Barricades Type III consists of furnishing, positioning, repositioning, maintaining and removing. Portable Breakaway Barricades Type III where indicated on the plans and/or as directed by the Engineer. 850.33: Portable Changeable Message Sign Portable Changeable Message Sign consists of furnishing, positioning, repositioning, operating, maintaining, and removing a portable changeable message sign as needed and/or as directed by the Engineer. All messages displayed shall be approved by the Engineer prior to being displayed. 850.34: Truck Mounted Attenuator Truck Mounted Attenuator consists of furnishing a moveable impact attenuator equipped with a flashing arrow board. The impact attenuator can be either a truck -mounted or a tow -behind unit. 850.35: Temporary Illumination Temporary Illumination shall conform to the relevant provisions of Section 800: Traffic Control Devices , the Massachusetts Electrical Code and OSHA Safety Standards. The work consists of illuminating the work areas and lane drops on a temporary basis as designated by the Engineer. Lighting for paving and planning operations shall also conform to the require ments of Subsection 450: Hot Mix Asphalt Pavement. All lighting equipment shall be approved by the Engineer prior to use. The Contractor shall submit to the Engineer a lighting plan for approval. No nighttime work shall be performed until the plan is approved by the Engineer. The lighting plan shall be prepared by a Professional Electrical Engineer and consist of the means and methods of the proposed lighting and contain supporting calculations. MATERIALS 850.40: General Devices required under this Section need not be new but must be in first class condition and acceptable to the Engineer. The condition of the work zone traffic control devices shall meet the Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.430 202 4 Edition quality standards set forth in the Quality Standards for Work Zone Traffic Control Devices compiled by ATSSA. Any devices that, in the judgment of the Engineer, are unsatisfactory in appearance and/or performance shall be removed and immediately replaced by acceptable devices.
850.41 : Roadway Flagger
Each flagger shall be equipped with the following high visibility clothing, signaling, and safety devices:
1.A white protective hard hat with a minimum level of reflectivity per the requirements of ANSI, Type I, Class E&G;
2.A clean, non -faded, non -torn lime/yellow reflective safety vest and safety pants meeting the requirements of ANSI 107 Class 3;
3.A 24 in . “STOP / SLOW” traffic paddle conforming to the requirements of Part 6E.03 of the MUTCD, a weighted, reflectorized red flag, flagger station advance warning signage, and two-way radios capable of providing clear communication within the work zone between flaggers, the Contractor, and the Engineer. The traffic paddle shall be mounted on a pole of sufficient length to be 7 ft above the ground as measured from the bottom of the paddle;
4.A working flashlight with a minimum of 15,000 candlepower and a 6- in. red attachable wand, a whistle with an attached lanyard, and a First Aid kit that complies with the requirements of ANSI Z308.1 ; and
5.An industrial/safety type portable air horn that complies with the requirements of the U.S. Coast Guard. 850.42: Traffic Cones for Traffic Management Traffic cones shall meet the requirements of M9.30.11: Traffic Cones . 850.43: Safety Signing for Traffic Management Rigid signs shall be fabricated from plywood, aluminum or approved alternate substrate material. Plywood sign material shall be ⅝-in. Exterior MDO – General (one sided). Aluminum sign material shall be Type A, 0.080 in . thick, as specified in 828.42: Panels . The entire sign face shall be retro -reflectorized. Re trore flective sheeting shall conform to M9.30.0. Rollup s igns shall be fabricated from vinyl microprismatic retroreflective material. Background sheeting for all construction warning signs shall be of a fluorescent orange color. The minimum spectral radiance factor, in accordance with Section 5.1 of ASTM E991, for the fluorescence shall be as follows: New: .................................................................................................................................................. 110% minimum Weathered: ..................................................................................................................................... 60% minimum 850.44: Temporary Pavement Markings and Temporary Raised Pavement Markers Glass beads, tapes and paints used for temporary pavement markings shall be lead free, conform to M7.01.07, M7.01.16, M7.01.23 and M7.01.24 and meet the retroreflectivity requirements of the MUTCD for a period of 90 days. Final determination as to pavement marking quality shall be made by the Engineer. The Contractor shall supply a retroreflectometer for this purpose. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.431 202 4 Edition The colors of the marking materials shall be the standard highway colors of white or yellow and as outlined in the MUTCD. Temporary Raised Pavement Markers shall conform to M9.30.6: Temporary Raised Pavement Markers. 850.45: Arrow Board The unit shall consist of a black background panel meeting the requirements of MUTCD Type C and shall contain at least 15 amber lamps of approximately 8,000 initial maximum cd each. Panels shall have the capability of the following mode selections:
1.left or right flashing or sequential arrows;
2.left or right sequential chevrons;
3.flashing double arrow;
4.flashing caution; and
5.alternating diamond caution. Panels shall automatically provide for a minimum of 50 % dimming from their rated lamp voltage at night. The flashing rate of the lamps shall not be less than 25 or more than 40 flashes per minute. Minimum mounting height should be 7 ft above the roadway to the bottom of the panel, except on vehicle -mounted panels, which should be as high as practicable. 850.46: Reflectorized Drums Reflectorized drums shall conform to M9.30.9: Reflectorized Drum . Warning lights shall conform to the MUTCD Type A. All drums shall be maintained in a satisfactory manner including the removal of dirt and road film that causes a reduction in sheeting retroreflective efficiency. 850.49: Temporary Barrier The Contractor shall use a temporary barrier system that is listed on the QTCE . 850.51: Portable Breakaway Barricades Type III Portable Breakaway Barricades shall conform to the plans and the following requirements:
1.MUTCD.
2.Reflectorized sheeting conforming to M9.30.0: Retroreflective Sheeting , Type V III. Pipe shall be Polyvinyl Chloride (PVC) pressure rated SDR 21 or SDR 26 ASTM D2241. Fittings may be PVC ASTM D2665 or Acrylonitrile Butadiene Styrene (ABS) ASTM D2661 (Drainage Waste and Vent).
3.The alternating 6 in. wide reflectorized diagonal stripe shall be orange and white and shall slope downward at 45° toward the end by which the traffic is to pass. Barricades that block the passage of traffic or designate the end of the traveled way shall have alternating verti cal orange and white stripes on the rails. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.432 202 4 Edition 850.53: Portable Changeable Message Sign The Portable Changeable Message Sign shall be capable of performing all functions at ambient temperatures ranging from - 31°F to 165°F. There shall be no degradation of operation due to fog, rain or snow. Maintenance shall include periodic cleaning. When not being used the sign shall be stored in a secure area approved by the Engineer. The Portable Changeable Message Sign shall consist of the following major components:
A.Message Sign.
1.Type : The technology can be LED or a combination of both Flip Disk and LED (Hybrid).
2.Matrix Displays : Shall be character, line or full matrix.
3.Size : The message sign shall have a minimum height of 6 ft, maximum height of 6.5 ft and a minimum width of 8 ft , maximum width of 12 ft.
4.Colors : The display shall be either fluorescent yellow or ITE amber.
5.Lines : The message sign shall have the capability of displaying at least three lines of 18 in. characters with a minimum of 8 characters per line.
6.The sign shall be illuminated for nighttime visibility.
B.Operator Interface. A means of creating and controlling the display message(s) on –site and remotely through an NTCIP compatible IP addressable modem, shall be provided with each sign. The operator interface shall contain as a minimum the following:
1.Display terminal with keyboard to allow previewing the message content and format before it is sent to the sign panel. The keyboard shall be of a standard design.
2.Controller (CPU).
3.Lockable weatherproof enclosure for interface components.
C.Controller. The controller shall possess, at a minimum, the following features:
1.Full 32K user memory with the option for additional archive memory.
2.Capacity to store a minimum of 50 messages.
3.Changeable message flash rate capability.
4.A minimum of 24- hour battery back -up.
5.Password activation shall be software available.
D.Power Supply. The sign shall be capable of operation from a diesel -powered generator, a battery or solar power. The power supply shall be protected from the weather and be locked for security.
E.Trailer. The trailer shall have at least the following features:
1.A current Registry of Motor Vehicles registration as per Subsection 7.04: Motor Vehicles . Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.433 202 4 Edition 2. Swivel jacks capable of leveling the trailer on a 1:6 (1 vertical to 6 horizontal) slope and capable of stabilizing the trailer in winds of up to 80 mph .
3.The sign shall be capable of being locked in a stowed position while being towed.
4.A lift mechanism shall be provided to elevate the sign to its operating position.
5.The capability to lock the sign panel in several off -angle positions with respect to the trailer axis. 850.54: Truck-Mounted Attenuator Only those truck mounted attenuators previously approved for the purpose intended and listed on the QTCE may be used. Since most approvals are conditional, any associated issues including but not limited to anticipated conditions, model, variations, modifications, proper installation of truck - mounted units and tow -vehicle specifications shall be resolved to the satisfaction of the Engineer before use in the field. The submitted information shall include estimated displacement characteristics for a variety o f impacts (assumptions regarding both impacting vehicle weight and speed) so that appropriate temporary traffic control set -ups can be undertaken in the field. The flashing arrow board shall conform to the requirements of 850.45: Arrow Board . 850.55: Temporary Illumination for Work Zones All floodlights shall have flat lenses securely fastened to the housing. All floodlight fixtures shall be mounted at a sufficient height to allow for an aiming angle of 45 degrees from the vertical to the job site. An inventory of spare lamps and fixtures shall be maintained on the job site and all lamp or fixture failures shall be repaired or replaced immediately. Illumination Standards for Work Area The entire work area shall be illuminated to a minimum average of 10 fc measured on a horizontal plane 6 in. above the work surface. A uniformity ratio (average to minimum) of 4 to 1 or better shall be maintained at all times in the work area. This shall apply to the work areas only. Any area where all phases of the work are completed need not be illuminated except for the safety and transition area lighting. Illumination Standards for Transition Areas The transition areas are the sections of roadway where road users are redirected out of their normal path. The traveled way within these areas and all cones, drums, or other physical barriers placed on the roadway for the purpose of channelizing or restricting vehicular traffic shall be illuminated to a minimum average of 2 fc measured on a horizontal plane 6 in. above the roadway surface. A uniformity ratio (average to minimum) of 4 to 1 or better shall be maintained at all times in the transition area. These areas to be illuminated shall be defined as beginning at the first cone, barrel drum or other physical channelizing device, continuing across the full roadway width through the transition area, and ending where the traveled way attains a constant width. Lighting Equipment Mounting Mounting shall be designed and constructed by the contractor to suit the configuration of the equipment to which the lighting is attached. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.434 202 4 Edition Mounting shall be secure to prevent excessive vibration. Care shall be exercised to ensure that fixture mounting will clear all overhead structures. All equipment lighting shall be aimed in such a manner as to maximize the illumination on each individual task. All lighting units shall be placed in such a manner as to avoid shadows on the work area or the travel area and to prevent excessive glare to the motorist. An inventory of spare lamps and spare fixtures shall be maintained on the job site by the contractor and all lamp or fixture failures shall be repaired or replaced immediately. CONSTRUCTION METHODS 850.61: Roadway Flagger Flaggers used during the performance of the Work shall be at least eighteen years of age. Flaggers used during the performance of the Work shall possess a current certificate of satisfactory completion from a Department- approved flagger training program wi thin the previous two years. Prior to the start of work, the Contractor shall provide to the Engineer a written list of certified flaggers to be used, including the most recent date of certification or re -certification for each person listed. All flaggers shall carry their approved flagging training program certification card with them while performing flagging duties. Flagger certifications shall remain valid for the duration of the project or the flagger shall be removed from the project. Flaggers shall have completed a First Aid training course according to the standards and guidelines of the American Heart Association or the American Red Cross. Flaggers shall carry their First Aid certification cards with them while performing flagging duties. First Aid certifications need not be renewed once the initial certification has expired. 850.62: Traffic Cones for Traffic Management Traffic Cones shall be in good condition and sufficiently ballasted as determined by the Engineer. Any cones damaged by traffic shall be immediately replaced. The Contractor shall keep an adequate supply of spare cones on hand to replace any damaged cones. The Contractor shall take steps to prevent cones from being blown over or displaced by wind or moving vehicular traffic. Cones shall not be left in position or on the highway when the construction operations have ceased. If it becomes necessary for the Department to remove any cones from the project due to negligence by the Contractor, all costs for this work will be charged to the Contractor. 850.63: Safety Signing for Traffic Management Signs which are damaged or are missing from their locations shall be replaced by the Contractor without additional compensation except as described in Subsection 7.17: Traffic Accommodation . All signs shall be maintained in a satisfactory manner including the removal of dirt or road film that causes a reduction in sign reflective efficiency. All signs shall be mounted in compliance with the requirements of the MUTCD. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.435 202 4 Edition All signs not consistent with the use of the roadway shall be removed, completely covered, or turned away from traffic each day. In no case shall signs or their portable supports be left in the traveled way when the traffic management set -up has been remov ed. Rollup signs shall only be used for single work shift setups. 850.64: Temporary Pavement Markings and Temporary Raised Pavement Markers The Contractor shall install all necessary temporary pavement markings and temporary raised pavement markers, or both, prior to opening the roadway to traffic following the completion of each day’s operations. Temporary raised pavement markers shall be supplemented with tape or painted markings to assure lane delineation. The Contractor shall make all necessary arrangements for this work beforehand so that it may be properly coordinated with construction operations. Temporary pavement markers and temporary raised pavement markers shall be installed in accordance with the requirements of the MUTCD. 850.65: Arrow Board The arrow board shall be deployed as shown on the approved Temporary Traffic Control Plan or as directed. The unit shall be properly maintained throughout its use on the project. 850.66: Reflectorized Drums Reflectorized drums are to be used as channeling devices in highway work zones. The first five drums used for any taper or as designated on the Temporary Traffic Control Plan shall be equipped with flashing lights.
850.67 : Pavement Marking Removal
Existing pavement markings shall be removed to the fullest extent possible by an approved method. Pavement marking removal methods shall not cause damage to the pavement or cause drastic change in texture, which could be construed as delineation at night, and shall be approved by the Engineer. It is not permissible to paint over existing markings with black paint in lieu of removal. Approved methods include but are not limited to:
1.High pressure air.
2.High pressure water (cold weather use not permitted)
3.Sand blasting,
4.Mechanical devices such as grinders, sanders, scrapers, scarifiers and wire brushes. Painting over a pavement marking line by use of asphaltic liquids or paints will not be permitted. Conflicting pavement markings shall be removed before any change is made in the traffic pattern. Material deposited on the pavement as a result of removing markings shall be removed as the work progresses. Accumulations of sand or other material, which might interfere with drainage or could constitute a hazard to traffic, will not be permitted. Any damage to the pavement or surfacing caused by pavement marking removal shall be satisfactorily repaired at no additional cost to the Department. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.436 202 4 Edition Where the removal operation is being performed near a lane occupied by traffic, a vacuum attachment operating concurrently with the removal operation must be in use. All residue shall be removed immediately from the surface being treated.
850.68 : Raised Pavement Marker Removal
Existing raised pavement markers shall be removed by a method approved by the Engineer. Any damage to the pavement or surfacing caused by pavement marking removal shall be repaired at no additional cost by methods acceptable to the Engineer. Voids in the pavement shall be filled with like materials with adhesive bonding to the substrate.
850.69 : Temporary Barrier and Temporary Barrier Removed and Reset
The Temporary Barrier shall be installed as shown on the plans, in accordance with these provisions and/or as directed by the Engineer. Each run of temporary barrier units shall be fastened together to form a continuous chain. Temporary impact attenuators with delineation shall be installed at ends of barriers within 30 ft of approaching traffic. The Contractor shall not leave a barrier leading -end unprotected. Delineators shall be installed in conformance with manufacturer’s recommendations on the barriers at their termini; at 20- ft intervals on tangent sections; and 10 -ft intervals on curved sections depending on radius as determined by the Engineer. Delineators mounted on top of barriers separating opposing traffic shall have two sided amber reflectors delineating the left edge. Side mounted delineators shall have amber delineating the left edge, white delineating the right edge and have red as the back color. If mounted on the sides they shall be 6 in. below the top and on the side of traffic. Delineators shall be mounted at angles that provide maximum reflectorization. Temporary Barriers shall be removed from existing locations and reset in accordance with above requirements, as directed by the Engineer. 850.71: Portable Breakaway Barricades Type III The Contractor shall furnish, set up, move and remove Portable Breakaway Barricades Type III as required or directed by the Engineer. Portable Breakaway Barricades Type III shall be maintained in a good and serviceable condition throughout the project and shall be moved from place to place as required during construction and as directed by the Engineer. 850.73: Portable Changeable Message Sign The changeable message unit shall be available for immediate use throughout the duration of the project and be positioned in accordance with the Temporary Traffic Control Plan and/or at the direction of the Engineer. The sign shall be visible from a minimu m distance of 900 ft with a viewing angle of no less than 30 °. The Contractor shall take appropriate measures as needed within the roadway layout to provide the required minimum sight distance. The Contractor shall be responsible for the maintenance of each device and appurtenance. If the unit is found to be defective in any way it shall be replaced immediately at the Contractor’s expense. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.437 202 4 Edition 850.74: Truck-Mounted Attenuator The truck -mounted attenuator shall be utilized as shown on the plans or as directed by the Engineer, at the proper orientation and height above the paved surface. A damaged truck -mounted attenuator shall not be used. Any repairs to the attenuator shall be accompanied by a statement from the product manufacturer certifying the repairs that were performed. Any work that becomes delayed due to the lack of a properly fu nctioning truck - mounted attenuator will not constitute justification for an extension of time. 850.75: Temporary Illumination All portable lighting shall be located off the travel way. Whenever possible the lighting shall be located on the side of the road opposite the closed lanes. The Contractor shall provide power to adequately energize the lighting equipment specified. Generator placement and wiring shall be in compliance with the Massachusetts Electrical Code and OSHA safety standards. The Contractor shall furnish to the Engineer a Multi -function digital luminance meter, complete with instructions and capable of measuring from 0.01 to 200 fc . The illumination on the project shall be monitored at random intervals for conformance to the specifications set forth herein. Substandard illumination shall be sufficient reason for the Engineer to stop all affected work until the substandard situation is corrected. COMPENSATION 850.80: Method of Measurement Construction Vehicle Warning Devices and Personal Protective Safety Equipment shall be incidental to the work of the Contract and shall not be measured for payment. Roadway Flagger will be measured on an hourly basis for only the actual time spent flagging. Partial hours shall be measured in 0.5 -hour increments rounded up to the next 0.5 hours if a portion of that 0.5 hours is worked. Traffic Cones for Traffic Management will be measured by the day. Traffic Cones for Traffic Management will be measured for payment only when 50 or more cones are used together in a string, spaced in accordance with the Traffic Control Plan and the MUTCD, for the purpose of closing a traffic lane, shifting traffic, channelizing, or otherwise redirecting traffic. The use of less than 50 cones in a string shall be incidental to the work with no additional compensation. Other uses of traffic cones shall be inc idental to the work activity with which the cones are associated. Each period of up to 24 hours during which Traffic Cones for Traffic Management are in place will be measured as 1 day, regardless of the number of times that the cones are positioned, repositioned, removed or returned to service and regardless of the number of locations at which traffic cones are used. Ballast to weight the cones shall be incidental to the work with no additional compensation. Safety Signing for Traffic Management will be measured by the square foot and the quantity will be only that which is actually used on the project. Regardless of the number of times that a sign may be reused on the project, it will not be measured for payment more than once. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.438 202 4 Edition Temporary Pavement Markings will be measured by the foot using the procedure outlined for Permanent Pavement Markings in 860.80: Method of Measurement . Temporary Raised Pavement Markers will be measured by the unit each. Arrow Board will be measured by the day. Each period of up to 24 hours during which an arrow board is in use will be measured as one day, regardless of the number of times that the unit is positioned, repositioned, removed or returned to service. Reflectorized Drums will be measured by the day. Each period of up to 24 hours during which a reflectorized drum is in use will be measured as one day regardless of the number of times that the drum is positioned, repositioned, removed or returned to service. Pavement Marking Removal will be measured by the square foot of existing pavement marking actually removed. Raised Pavement Marker Removal will be measured by the unit each. Temporary Barrier and Temporary Barrier Removed and Reset will be measured by the foot, in place. Barrier removed and reset for the purpose of gaining access to the construction work zone shall not be measured for payment. Any barrier removed and reset for the convenience of the Contractor will not be measured for payment. Portable Breakaway Barricade Type III will be measured as one unit each regardless of size. Portable Changeable Message Signs will be measured by the day. Each period of up to 24 hours during which a Portable Changeable Message Sign is in place will be measured as one day, regardless of the number of times that the sign is positioned or repositioned, removed or returned to service. Truck -Mounted Attenuator will be measured by the day which shall include the attenuator, the truck or tow vehicle, the operator or driver, maintenance of the vehicle and components, and arrow board. Each period of up to 24 hours during which a Truck -Mounted Attenuator is in place will be measured as one day, regardless of the number of times that the Truck Mounted Attenuator is positioned, repositioned, removed or returned to service during that period. In either case, the unit and the accompanying truck are considered one unit for measurement and payment purposes. Temporary Illumination for Work Zone will be measured by the day for each period of up to 24 hours during which temporary illumination is used, regardless of the number of operations requiring lighting, or the number of times that the illumination is positioned, repositioned, removed or returned to service. 850.81: Basis of Payment The contract prices under these items shall constitute full payment for all material, labor and equipment required or incidental to the satisfactory completion of the work as described above. Any devices provided under this section which are lost, stolen, destroyed or deemed unacceptable while their use is required on the project shall be replaced without additional compensation. Devices damaged by traffic will be compensated in accordance with Subsection 7.17: Traffic Accommodation including temporary impa ct attenuators. This shall not include other temporary traffic control devices, such as cones, drums and temporary signs. Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.439 202 4 Edition Roadway Flagger will be paid for at the contract unit price per hour which shall include full compensation for all costs for providing flaggers. No allowance or additional payment will be made for required training, equipment, travel time, transportation, or any administrative charges associated with the costs of flaggers. No allowance shall be made for overtime payment rates. The Contractor shall not be charged nor compensated for the use of MassDOT employee flaggers. This item shall not be subject to rene gotiation for any reason under Subsection 4.06: Increased or Decreased Contract Quantities regardless of whether or not this item overruns or underruns. Traffic Cones for Traffic Management will be paid for at the contract unit price per day which shall provide full compensation for furnishing, positioning, repositioning, and removing traffic cones as directed by the Engineer. A day shall cover all traffic cones for traffic management necessary in that time period, regardless of the total number of cones and regardless of the number of locations at which cones are used. The Contractor will receive the day payment for the period in which the Traffic Cones for Traffic Management are deployed. Safety Signing for Traffic Management will be paid for at the contract unit price per square foot which shall include full compensation for furnishing, installing, maintaining, positioning, repositioning, and removing the signs. Temporary Pavement Markings will be paid for at the contract unit price per foot which shall include full compensation for furnishing, installing, maintaining and removing, the markings and markers. Temporary Raised Pavement Markers will be paid for at the contract unit price each which shall include full compensation for furnishing, installing, maintaining and removing, the markings and markers. Arrow Boards will be paid for at the contract unit price per day which shall include full compensation for furnishing, positioning, repositioning, and removing Arrow Boards as directed by the Engineer. Reflectorized Drums will be paid for at the contract unit price per day which shall include full compensation for furnishing, positioning, repositioning, and removing Reflectorized Drums as directed by the Engineer. Flashing lights as shown on the Temporar y Traffic Control Plan shall be considered incidental to Item 859. Reflectorized Drum. Pavement Marking Removal will be paid for at the contract unit price per square foot which shall provide full compensation for removing existing markings including any necessary repairs to the roadway surface. Raised Pavement Markers Removal will be paid for at the contract unit price each which shall provide full compensation for removing the existing markers and filling the voids in the pavement. Temporary Barrier will be paid for at the contract unit price per foot which shall provide full compensation for furnishing, installing, delineating, aligning, maintaining and final removal of the temporary barrier. Temporary Barrier Removed and Reset will be paid for at the contract unit price per foot which shall provide full compensation for removing, relocating, re- setting, re- aligning, transporting and maintaining the temporary barrier including delineation, as specified above. The Contractor will be paid Removed and Reset each time the barrier is relocated either to a new work zone, to off- season storage, or back to the project from storage. The Contractor will not be separately compensated for Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.440 202 4 Edition any work necessary to maintain or re -align units or replace damaged units. No payment will be made for removing and resetting barriers for the purpose of gaining access to the construction work zone. No payment will be made for removing, relocating and res etting any barriers moved for the convenience of the contractor. Portable Breakaway Barricades Type III will be paid for at the contract unit price each which shall provide full compensation for all material, labor and equipment necessary to furnish, install, maintain, move and remove the barricades. Gravel Borrow for any foundation and anchorage work for Temporary Impact Attenuators will be paid for at the contract unit price under Item 151. Gravel Borrow. Portable Changeable Message Signs will be paid for at the contract unit price per day which shall provide full compensation for furnishing, positioning, repositioning, and removing Portable Changeable Message Signs as specified or as directed by the Engine er. Truck Mounted Attenuator will be paid for at the contract unit price per day which shall provide full compensation for positioning, repositioning, removing or returning to service as required or as directed by the Engineer. The Contractor will receive the day payment for each continuous work period in which the Truck Mounted Attenuator is deployed. Temporary Illumination for Work Zone will be paid for at the contract unit price per day which shall provide full compensation for all lighting specified for use in lane drops, work areas, and other lighting locations as directed by the Engineer. The work includes the lighting plan, delivery, removal, setting and resetting of all floodlighting equipment, staging or tripods, generators, wiring, the light meter, adjustment, maintenance and any equipment necessary or incidental to the operation of a lighting s ystem. 850.82: Payment Items
850.41 Roadway Flagger .......................................................................................................... Hour
851.1 Traffic Cones for Traffic Management ................................................................ . Day 852. Safety Signing for Traffic Management Square ............................................... Foot 853.1 Portable Breakaway Barricade Type III ............................................................. Each 853.2 Temporary Barrier (TL -2) ........................................................................................ Foot
853.21 Temporary Barrier Removed and Reset ............................................................ Foot
853.403 Truck Mounted Attenuator ...................................................................................... Day 853.8 Temporary Illumination for Work Zone ............................................................. Day 854. Temporary Raised Pavement Marker ................................................................ . Each 854.016 Temporary Pavement Markings – 6- inch (Painted) ...................................... Foot 854.036 Temporary Pavement Markings – 6- inch (Tape) ........................................... Foot 854.1 Pavement Marking Removal .................................................................................. Square Foot 854.5 Raised Pavement Marker Removal ....................................................................... Each 856. Arrow Board .................................................................................................................. Day
856.12 Portable Changeable Message Sign ...................................................................... Day
859. Reflectorized Drum ..................................................................................................... Day Massachusetts Department of Transportation – Highway Division Standard Specifications for Highways and Bridges II.441 202 4 Edition SUB
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