WYOMING DEPARTMENT OF TRANSPORTATION SUPPLEMENTAL SPECIFICATION FOR TEMPORARY TRAFFIC CONTROL

Transcription

1 Page 1 of 17 WYOMING DEPARTMENT OF TRANSPORTATION SUPPLEMENTAL SPECIFICATION FOR TEMPORARY TRAFFIC CONTROL This supplementary specification supplements, amends, and where in conflict therewith, supersedes various sections of the 2003 edition of the Wyoming Department of Transportation's Standard Specifications for Road and Bridge Construction DESCRIPTION SECTION 703 Temporary Traffic Control This section describes the requirements for furnishing, placing, maintaining, repairing, and removing temporary traffic control devices MATERIALS General Use temporary traffic control devices that meet the testing requirements of the Manual for Assessing Safety Hardware (MASH) or NCHRP-350, test level 3. Maintain and submit certification records in accordance with Subsection , Documentation. Use temporary traffic control devices and flagger paddles fabricated with retroreflective sheeting in accordance with Subsection 816.4, Retroreflective Sheeting Drums, Cones, and Tubular Markers Use drums, cones, 42-inch [1067 mm] cones, and tubular markers that are plastic and predominantly orange. Use drums and 42-inch [1067 mm] cones that have alternating stripes, two orange and two white with orange on top, that are retroreflective and equal width Signs Use the same sign sheeting material for each sign face on any sign installation. If hinged signs are used, ensure that the hinge does not block any part of the sign message. Permanent sign posts that meet MASH or NCHRP-350, test level 3 may be used as approved by the engineer. Use surfaced, four-sided (S4S), untreated timber for sign posts.

2 Page 2 of Sign Panels Construct sign panels of either: 1. Plywood. At least 1/2 in [12 mm], medium density, exterior grade B-B, overlaid fir plywood sheets meeting the requirements of the Product Standards PS1-95 for construction and industrial plywood published by the U.S. Department of Commerce. 2. Aluminum. Sheet aluminum in [3 mm] or in [2 mm] thick meeting the requirements of Subsection 816.1, Sheet Aluminum for Sign Panels. 3. Other materials meeting MASH or NCHRP Backing Angles Use sign panels backed with 2 in 2 in 3 / 16 in [50 mm 50 mm 5 mm] galvanized steel or aluminum backing angles and mounted to the post with 2 in 2 in 3 / 16 in [50 mm 50 mm 5 mm] galvanized steel clip or aluminum angles except that sign panels 48 in 60 in [1220 mm 150 mm] or smaller may be backed as follows: 1. Aluminum panels in [2 mm] thick and backed with metal backing angles or 2 in 4 in [50 mm 100 mm] dimensional lumber. 2. Aluminum panels in [3 mm] thick and unbacked. 3. Plywood panels 1/2 in [12 mm] thick and unbacked. Use galvanized bolts, locknuts, and washers that meet the requirements of Subsection 815.6, Bolts and Fasteners, to attach the sign panels to the backing members. Use locknuts that have a fiber or nylon insert. Use elevator bolts with heads flush with the surface of the sign panel Striping Paint and Glass Beads Use commercially manufactured yellow or white highway striping paint for temporary pavement markings, and apply it without dilution. Make the painted pavement markings reflective by dropping or spraying glass beads onto the wet paint. Use retroreflective beads that meet the requirements of AASHTO M 247, Type I Temporary Pavement Striping Tape Use temporary retroreflective pavement striping tape that is pressure-sensitive and manufactured for use as pavement striping.

3 Temporary Raised Pavement Markers SS-700J Page 3 of 17 Use temporary raised pavement markers that are the same color on the face and body as the markings for which they are substituted, have a dimension of at least 2 in 4 in [50 mm 100 mm], are constructed of a high impact-resistant plastic material, and have at least 1.0 in² [645 mm²] of retroreflective area in each face. Use markers that are designed for adhesion to the road by either hot melt bitumen, epoxy, or butyl pads. Use an adhesion method that allows for easy removal of markers without pavement damage Flags Use flags 24 in [600 mm] square, except on signs use flags 16 in [400 mm] square or larger. Use flags with weighted corners or reinforcing to keep the flag extended away from the post. Do not use mesh flags Portable Plastic Water Filled Barrier Use portable, longitudinal, crashworthy plastic barrier that meets the following requirements: 1. MASH or NCHRP-350, test level Approximate dimensions of 78 in 21 in 32 in [1980 mm 530 mm 810 mm] (length width height). 3. White and orange striped in accordance with the MUTCD. 4. Provide a crashworthy end terminal, or barrier that acts as its own crashworthy end treatment, or flare barrier outside the clear zone Temporary Concrete Barrier and End Terminal Provide temporary concrete barrier and terminals meeting the requirements of the contract. If the barrier is to remain the property of the contractor and does not have to connect to state furnished barrier, it is acceptable to furnish another temporary concrete barrier type meeting the requirements of MASH or NCHRP-350, test level TL-3 with a maximum dynamic deflection of 4 ft [1.2 m]. Furnish FHWA letter of acceptance for the barrier type and connection detail and evidence of maximum dynamic deflection to the engineer. Provide crashworthy terminals where terminated within the clear zone or flare outside clear zone. Use class B concrete in accordance with Section 513, Structural Concrete, and incorporate grade 40 [400] reinforcing steel. Finish with an ordinary surface and with a 1-inch [25 mm] chamfer on corners. Use anchor pins, connecting pins, and other miscellaneous hardware that meet or exceed the requirements of ASTM A 36 [ASTM A

4 Page 4 of 17 36M]. Coat exposed steel with one coat of shop primer, applied at a minimum wet thickness of 3 mil [75 µm]. Use bidirectional delineators approved by the State Traffic Engineer that match the color of the adjacent edgeline pavement stripe. Attach delineators to the barrier and terminal in accordance with the manufacturer s recommendations EQUIPMENT Sequential Chevron Use portable, wheel-mounted units that meet the requirements of the MUTCD and provide or are capable of all the following: 1. A 48 in 96 in [1200 mm 2400 mm] panel. 2. Flash in both the left and right directional modes. 3. An automatic dimmer switch for reducing the nighttime illumination level by 50 percent or other levels as needed. 4. A manual override backup switch. Replace units that are not reliable or do not provide the necessary constant light source. Maintain sequential chevrons in working order at all times. Chevrons may be powered by a generator on site, utility power, or solar power. Ensure that the power source is able to maintain constant operation. Generator power will be allowed only as approved by the engineer CONSTRUCTION General Furnish, install, locate, maintain, and remove construction traffic control devices. If changes to the traffic control plan are proposed, prepare a revised traffic control plan, and submit it to the engineer at the preconstruction conference, or as requested by the engineer, in accordance with Subsection , Preconstruction Conference. Do not change traffic operations from the details and standard plans included in the contract, unless an alternate plan is submitted to and approved in writing by the engineer. Ensure the alternate plan is the same quality and detail as the one shown in the contract. Modify the plan as the situation warrants, and submit the revised plan to the engineer for approval. If traffic or workers may be affected, do not begin work until the necessary construction traffic control devices are in place and approved by the engineer.

5 Page 5 of 17 When placing, maintaining, and removing traffic control devices, provide the traffic control necessary for the safety of the public and the workers, at no additional cost to the department. Schedule work to minimize the number and duration of required traffic control set-ups. Whenever possible, sequence work operations so that traffic control can be removed at night to allow full use of the roadway. Construction traffic control device spacing is approximate; adjust it to fit field conditions. To provide maximum visibility of warning devices to oncoming motorists, consider roadway conditions, obstacles, geometrics, and permanent signing when placing construction signs. Changes in location and spacing are subject to approval by the engineer. Check construction sites periodically, day and night, to ensure adequate traffic control is in place. Completely cover or remove existing traffic control devices conflicting with construction traffic control, as approved by the engineer, and return them to their previous locations, as necessary, at the completion of the work. Ensure the method of cover does not damage or puncture the existing sign. Remove or completely cover construction traffic control devices during seasonal suspensions and when not in use or needed. When anchoring traffic control devices, sand bags or an approved alternate may be used for ballasting, not exceeding 12 in [300 mm] in height above ground level. Do not ballast devices by heavy objects such as rocks, chunks of concrete, or plant mix. When construction work is suspended in accordance with Subsection 108.5, Suspension of Work, remove unneeded construction traffic control devices, including posts Documentation Maintain certification records that each temporary traffic control device meets the MASH or NCHRP-350 testing requirements specified. Furnish appropriate documentation to the engineer upon request. When temporary traffic control is paid by traffic control device (TCD) units, and unless agreed otherwise, provide a daily record of the traffic control device units and flagging hours used on the project for that day to the engineer. Include all of the information required on the Daily Traffic Control Device Record (Form E-101) in the daily record. If Form E-101 is not used, use a form with consistent layouts for every daily traffic control record submitted on the project. Discuss and agree on the submittal process for the daily traffic control record with the engineer at the preconstruction conference.

6 Page 6 of Traffic Control Maintenance Submit the name(s) of a designated traffic control maintainer(s) and the telephone number where the contractor s superintendent and maintaining personnel can be contacted, at any time, to the engineer before installing any traffic control. Provide cellular or other portable phone service when needed to ensure the availability of the superintendent and maintaining personnel. Provide a maintainer if traffic is being diverted or protected by channelizing devices, barricades, portable signs, flagging, or pilot car operations. Ensure the traffic control maintainer(s) is available to respond to notification by the engineer, a law enforcement official, or a page from a portable traffic signal to perform traffic control maintenance. Ensure the traffic control maintainer(s) performs the necessary traffic control device maintenance by keeping the devices in the proper location and in good condition. Provide the number of traffic control maintainers necessary to meet the specified requirements. Ensure traffic control devices are maintained while in use on the roadway Channelizing Devices Mark initial channelization device locations with paint so that replacement devices can be installed in the proper locations without measuring again. In rural areas, cones, 42-inch [1067 mm] cones, or 42-inch [1067 mm] tubular markers may be used instead of drums as channelizing devices during the daytime only. The name and phone number of the channelizing device owner may be shown on the non-reflective surface at the bottom of the device or on the back of signs in letters and numbers that are a non-reflective color and not over 2 in [50 mm] in height Signs General Road Work Next Miles and End Road Work signs are not required for projects less than 2 mi [3 km] in length or less than 28 calendar days in anticipated duration. Use Road Work Ahead warning signs on major approach ramps or roads in close proximity to construction areas, as approved by the engineer. Ensure the backs of signs are not distractive to motorists and contain no visible message, design, or reflectivity except as provided herein. Ensure backing angle materials are covered by sign sheeting.

7 Page 7 of 17 If the duration of a sign installation is less than 14 calendar days, the sign mounting may be a portable. If the duration of a sign installation is 14 calendar days or more, use a fixed sign mounting, unless otherwise approved by the engineer. Use sign posts that do not extend above the sign and are installed plumb. Determine sign post lengths. Use break away holes for timber posts as specified, and do not allow any additional or plugged break away holes within the visible post section. If necessary, request detail layouts of temporary traffic control signs lettering from the engineer. Flags may be added to construction signs for better daytime visibility. Use flags on the Flagger Ahead and the Be Prepared to Stop signs. If sign panels installed without backing will be needed throughout the suspension, install backing angles in accordance with Subsection , Backing Angles, before the suspension of work Special Signs Special signs that are unique to the project, i.e., signs not specified or included in part VI of the MUTCD, and signs containing a message which is unique to the project may be furnished by the contractor or the department, as specified. The engineer will stake locations for special signs. Furnish posts, hardware, and equipment for fixed and portable installations; determine post length; and erect special signs. Upon removal, special sign panels will be the property of the department; posts, hardware, and portable installation equipment belong to the contractor Portable Signs and Mounts When portable traffic control devices are not in use, remove them as far from traffic as possible and, at a minimum, outside of the clear zone specified, as approved by the engineer. Position them so as not to confuse approaching motorists Flagging Use flaggers that have completed and passed a flagger training program approved by the State Construction Office before flagging. A three-day grace period will be allowed to meet this requirement in an unplanned emergency situation. Ensure that flaggers are tested every three years and that they have a current certification card in their possession when they are on the project. Ensure that flaggers wear a strong yellow-green vest or an orange and strong yellowgreen combination vest with reflectorization on the front, back, and sides and a strong yellow-green hard hat (full hard hat covers are acceptable), and they have a paddle and flag (optional) in their possession at all times. The color of strong yellow-green for vests and hard hats is for flagger use only. Supply and maintain the vest, hard hat, paddle,

8 Page 8 of 17 and flag in a like new condition. Do not place company name or logo on the flagger vest. Ensure that flaggers have positive communication between flagging stations appropriate to the various types of operations. This communication may include but is not limited to the following: 1. Hand signals. 2. Passing of a baton. 3. Radio communication. 4. Combinations of the above. Use flagger radios for communication between flagging stations only. Use radios that are good quality and reliable so that communications are continuous for various types of operations (including no sight and long distance situations). Do not use radios in electrically sensitive areas involving blasting or instances where the radio transmissions interfere with other established communication mediums. For nighttime flagging, use overhead lights that are on site and operational before their intended use, provide full illumination of the flaggers, and do not create glare for the flagger or motorist No Passing Zones No-Passing Zone signs may be used to delineate no passing zones after the centerline has been marked in the following situations: 1. Traffic volumes less than or equal to 1000 AADT. Up to 14 calendar days. 2. Traffic volumes greater than 1000 AADT. Up to three calendar days. Use temporary pavement markings if no-passing zones are required for durations longer than those specified in the previous paragraph. Place No-Passing Zone signs before removing the existing center line striping. Place temporary signing, striping, or barrier markers for no-passing zones at the same location as the existing permanent no-passing zones. The department will determine temporary no-passing zones in extenuating circumstances Temporary Pavement Markings General Use retroreflective temporary pavement markings that are paint, tape, raised pavement markers, or motorist guidance markers, either white or yellow, as specified. Do not use

9 Page 9 of 17 motorist guidance markers when interstate or divided highway traffic is placed two-lane, two-way. Use paint with beads for temporary pavement markings on all pavement lifts, except the final surface treatment, plant mix wearing course, chip seal, seal coat, or concrete pavement. Final surface treatment is defined as the existing surfacing on interstate or divided highway lanes that is designated to remain in place over the winter or the surface after the final surface designated in the contract has been applied. Use yellow temporary centerline markings on two-lane, two-way highways. Use white temporary lane line markings and white or yellow edge line markings on single direction, multi-lane highways. When interstate (divided highway) traffic is placed two-lane, two-way, use white edge lines and yellow pavement markings dividing opposing traffic. Ensure that the application surfaces for temporary pavement markings are free of foreign matter which would interfere with adhesion. Apply temporary pavement markings in accordance with the manufacturer s recommendations. Place temporary pavement markings to provide delineation by the end of each day s operations. Place the markings in line with existing centerline or lane line markings at the beginning or end of the paving section. Taper the markings at the beginning or end of the paving section to line up with existing centerline or lane line markings. Motorist guidance markers or temporary raised pavement markers may be approved for final lifts of plant mix pavement, chip seals, seal coats, and concrete pavement surfaces. Place temporary motorist guidance markers (tabs) in line with existing centerline or lane line markings. Maintain the temporary pavement markings in their proper location and in a clean, undamaged, effective condition while in use. Collect and properly dispose of removed temporary pavement markings and their protective coverings. When pavement markings are required but cannot be applied because of the surface type, install channelizing devices for the following: 1. Centerline delineation. May be used for centerline delineation day or night, as required by the engineer. 2 Edge of roadway delineation. Use for edge of roadway delineation day and night.

10 Page 10 of Temporary Pavement Striping Tape Temporary pavement striping tape may be used in the following circumstances: 1. Intermediate Lifts of Plant Mix Pavement. Striping tape may be applied in emergency situations only. If a removable type is used, remove it before placing the next lift of plant mix pavement. 2. Final Lift of Plant Mix Pavement or Existing Pavement. Use removable striping tape. After the permanent striping operations, remove temporary pavement striping tape without damaging the pavement surface Conflicting Pavement Markings Remove or cover conflicting pavement markings as approved by the engineer for work zone traffic control anticipated to be in place longer than three calendar days. Remove the markings without damaging the pavement surface, or cover the markings with removable, nonreflective, preformed tape in accordance with the MUTCD and approved by the engineer. If existing striping is removed, temporary striping may be used for increased motorist guidance. Use temporary striping that consists of paint, removable tape, temporary motorist guidance markers, or raised pavement markers Paint Apply paint at the rate of 100 ft²/gal [2.46 m²/l], which is a wet-paint thickness of 16 mil [405 µm]. Apply beads at the rate of 8 lb/gal [0.97 kg/l] of paint Sequential Chevrons Place the units at specified locations or as directed by the engineer, and keep them on the project for as long as needed. Replace units that are not reliable, do not have automatic dimmers, or do not provide the necessary constant light source within the times indicated in Subsection , Liquidated Damages Permanent Striping Permanent striping will be placed by the department. Striping will be placed by department personnel for projects that are suspended in accordance with Subsection 108.5, Suspension of Work Portable Plastic Water Filled Barrier Install as specified. Use an environmentally safe anti-freeze when freezing conditions are anticipated or encountered.

11 Page 11 of Temporary Concrete Barrier and Terminal General Use only one type of barrier and only one type of barrier connection, as approved by the engineer, on the project. Use barrier and end terminals that are in good condition, as determined by the engineer. Place barrier in smooth lines with connecting and terminal anchor pins fully inserted and pulling against the connecting pins to establish a tight connection. Drive terminal anchor pins into the ground. Repair or replace barrier or terminals that are damaged, as approved by the engineer, at no additional cost to the department Barrier to Become Property of the Department Provide barrier that meets all the following requirements: 1. Of the exact length specified. 2. With three types of lifting mechanisms: 2.1. Lifting hook Lifting holes Fork lift slots. 3. With delineators attached as follows: 3.1. Barrier. On both sides and the top of the sections End Terminals. Two on top and two on each side Barrier to Become Property of the Contractor Provide barrier that meets all the following requirements: 1. At least one lifting device. 2. The length specified or longer. 3. With delineators attached as follows: 3.1. Barrier. At a minimum, delineators on top and the side exposed to traffic End Terminals. Two on top and two on each side.

12 Page 12 of Traffic Control Supervisor Ensure the traffic control supervisor understands WYDOT requirements, items in the contract, the contractor s proposed operations, and Part VI of the MUTCD and holds a current certification as a WYDOT traffic control supervisor. Furnish proof of certification to the engineer at the preconstruction conference or prior to starting work, whichever occurs first. Duties include the following: 1. Ensure a set of contract documents is available for use at all times. 2. Ensure all devices, including replacements, have been delivered to the project before installation. 3. Inspect the condition of all traffic control devices to be used on the project before installation. 4. Review the project day and night within 24 hours of the installation of the traffic control devices, monthly, and after each change in the traffic control setup. Within one working day of the review, provide the engineer written documentation of the time and date of review, condition of traffic control devices and layout, and a list of modifications required or performed. 5. Propose changes to improve flow of traffic through the work zone. 6. Prepare, modify, and submit Traffic Control Plans in accordance with Subsection , General. 7. Provide the engineer with a 24-hour contact number. 8. Return the engineer s call within two hours of the time of the call. Be on site for: 1. The layout, installation, and removal of the traffic control devices when switching and returning traffic on interstate projects. 2. The initial layout, when any changes are made to the layout, installation, and removal of traffic control devices on projects that do not require traffic to cross over. 3. Review of problems within 24 hours of notification from the engineer.

13 Page 13 of MEASUREMENT and PAYMENT General When temporary traffic control is paid by traffic control device (TCD) units, the engineer will verify the quantities on the daily traffic control device record submitted by the contractor, and if approved, will use this record as the basis for measurement and payment for TCD units and flagging hours when applicable. Correct the record if requested and resubmit. Payment will not be made for quantities documented on a record when the corrected form is not received by the engineer within two working days after the mutually agreed to re-submission date. The engineer will measure: 1. Temporary Traffic Control by the lump sum. Additional flagging locations required by the engineer beyond that specified in the contract will be measured and paid for per hour, to the nearest quarter hour. Payment for the accepted quantities of additional flagging will be an adjustment to the contract lump sum bid price for temporary traffic control and will be made at the predetermined hourly wage rate, or quarter-hour fraction thereof, specified in the contract, plus 81 percent of that rate. Additional temporary traffic control devices required by the engineer beyond those specified in the contract and replacements for Category I and Category II temporary traffic control devices destroyed by traffic will be measured and paid for per each traffic control device (TCD) unit. Payment for Category II devices destroyed by traffic will be limited to the number of devices exceeding four in a single incident of damage. The number of TCD units for payment will be determined by multiplying the accepted quantities of each of the various devices by the TCD unit value specified for the device in the TCD Unit Schedule. Payment will be an adjustment to the contract lump sum bid price for temporary traffic control and will be made at a price of $1.50 per TCD unit. 2. Special Signs in accordance with Subsection , Special Signs. 3. Category TCD units, Category TCD units (option) per each unit. The unit value of each TCD will be as specified in the Traffic Control Device Unit Schedule included in the contract. The number of TCD units will be determined by multiplying the number of each of the various devices by the TCD unit value specified for the device in the Traffic Control Device Unit Schedule. 4. Category II TCD units for drums and temporary barrier placed parallel to the centerline of the roadway that are relocated laterally only once at each location but will measure for payment at subsequent locations. The engineer will measure in accordance with the following guidelines:

14 Page 14 of Moves across centerline and lane lines on two-lane, non-divided multilane, and urban roadways. Moves across centerline and lane lines to change lanes of closure will not be measured for payment, except the taper will be measured for payment as a new setup if the existing taper is in place for more than seven calendar days Moves from one lane to another on the interstate or similar median divided multilane highways. Moves to the opposite directional lane, i.e., eastbound lane to westbound lane, will be measured for payment as a new setup Tapers. If it is required that the taper be moved longitudinally, the new taper will be measured for payment Special requirements. Labor to make minor moves to comply with department requirements or special situations, such as oversize loads, etc., will be measured for payment as Force Account Work, in accordance with Subsection 109.4, Extra and Force Account Work, when the work involves more than one hour per a five-working day week. 5. Category IV TCD units for striping paint or tape as the sum of the lengths of the individual stripes or segments placed. 6. TCD unit rates for signs that are not included in the Traffic Control Device Unit Schedule, other than special signs which are unique to the project, by the rate for the sign with the area in square feet [square meters] that most closely approximates the area of the sign being installed. 7. Flagging by the hour. Flagging will be used to pay for the portable signal when the signal is used in accordance with Standard Plan 703-2C. 8. Cones and tubular markers used as channelizing devices as Category III TCD units once daily without regard to the number of relocations. The number measured for payment will not exceed the maximum number in use at any one time during a day. 9. Tubular markers used as roadside delineation as a Category I TCD unit per each installation. 10. If pay items for particular TCD categories are included in the Traffic Control Device Unit Schedule but are not included in the contract as pay items, and the engineer specifies or authorizes the use of temporary traffic control devices in those categories, TCD units for each such device will be paid at the unit price of $1.50 per TCD unit. 11. Sequential Chevron by the each or as a complete unit.

15 Page 15 of Plastic Water Barrier and Temporary Concrete Barrier by the foot [meter]. The engineer will measure the length of one section of barrier and multiply that length by the number of sections to determine the length for payment. Lateral repositioning of the barrier for the contractor s convenience will not be measured and paid for directly. 13. Temporary Concrete Terminal by the each. Relocation of portable traffic control devices within a 36 ft [11 m] radius or less will not be measured for payment. This applies to those devices that are temporarily moved from the edges of the traveled ways to allow for normal operation of the roadway. If portable signs are mounted on WC-4 barricades, the engineer will measure and pay for the portable sign installation only. If the engineer requests a WC-4 barricade with arrow or other specified signs attached to be placed at a particular location, measurement and payment will be made for each installation and for each subsequent relocation request. The engineer will measure and pay to reinstall traffic control devices removed for seasonal suspensions. The department will pay as follows: Pay Item Pay Unit Measure to the Nearest Pay to the Nearest Category TCD Units EA [Ea] EA [Ea] EA [Ea] Category TCD Units (option) EA [Ea] EA [Ea] EA [Ea] Flagging HR [h] 0.25 h 0.25 HR [0.25h] Plastic Water Barrier FT [m] 0.1 ft [0.05 m] FT [m] Sequential (1) Chevron EA, LS [Ea, LS] EA, LS [Ea, LS] EA, LS [Ea, LS]

16 Page 16 of 17 Temporary Concrete Barrier FT [m] 0.1 ft [0.05 m] FT [m] Temporary Concrete Terminal EA [Ea] EA [Ea] EA [Ea] Temporary Traffic (1) Control LS LS LS (1) When paid by lump sum: Once the item(s) have been placed, 30 percent of the lump sum item will be paid. Thereafter, the percentage paid will equal the percentage of the work complete up to and including 90 percent. The remaining 10 percent will be paid when the sequential chevrons are no longer required for guidance and protection. If it can be demonstrated to the satisfaction of the engineer that the pay mechanism is not an accurate pay out for the work performed, the percentages may be changed Referenced Sections for Direct Payment When specified, the engineer will measure and pay for: 1. Traffic control devices not shown in the Traffic Control Device Unit Schedule as Force Account Work in accordance with Subsection 109.4, Extra and Force Account Work. 2. Flagging in accordance with Section 703, Temporary Traffic Control. 3. Special sign panels furnished by the contractor that are unique to the project as Force Account Work in accordance with Subsection 109.4, Extra and Force Account Work. Transporting department furnished special signs to the project will be paid at one Category I TCD unit per mile [1.6 kilometer] Damaged Devices Replace devices that are destroyed or deemed irreparable at no additional cost to the department except in the following instances: 1. Category I Devices. Category I devices destroyed by traffic will be measured for payment once as an additional installation, when replaced. 2. Category II Devices. Category II devices destroyed by traffic will be measured for payment once as an additional installation, when damage in a single incident exceeds four devices.

17 Liquidated Damages SS-700J Page 17 of 17 During periods of work, the engineer will assess liquidated damages in the amount of $250 if damaged or deficient devices are not properly maintained within 30 minutes of notification or attempted notification, as specified in Subsection , Traffic Control Maintenance. During periods of non-work, the engineer will assess liquidated damages in the amount of $250 if damaged or deficient devices are not properly maintained within two hours after notification or attempted notification, as specified in Subsection , Traffic Control Maintenance. Thereafter, in either of the above cases, additional liquidated damages in the amount of $250 will be assessed for each successive twohour period during which the required maintenance is not performed. If more than 25 percent of the number of one type of device in use on the roadway is damaged in a single incident of damage, the assessment of liquidated damages will be waived for a period not to exceed eight hours after the notification as specified in Subsection , Traffic Control Maintenance, provided suitable arrangements are made with the engineer for interim traffic control measures. The engineer will assess liquidated damages in the amount of $250 per working day for each and every working day that the traffic control supervisor reports are received after the required time. These damages will be in addition to the overtime charges specified for failure to complete contract work on time and will be assessed simultaneously with the overtime charges. SECTION 704 Vacant