Attachment B.pdf

610.1 610.4.1.1

SECTION 610

WORK ZONE TRAFFIC CONTROL PROCEDURES

610.1

610.1 Description

610.1 This section contains specifications for materials, equipment, construction, measurement, and payment for work zone traffic control procedures provided for the maintenance of traffic during construction of the project in conformity with the Plans and the Specification or as directed by the RCE.

610.1 All traffic control procedures include providing, installing, maintaining, relo-cating, and removing the traffic control devices used for regulating, warning, and directing traffic and providing for delineation of travel lanes, warning of obstructions and hazards, and maintenance and control of traffic during the work. Install and conduct all work zone traffic control procedures in confor-mity with the SCDOT Standard Drawings, the applicable Supplemental Speci-fications, the Special Provisions, the Plans, the RCE, and as specified herein.

610.1 For each of the following work zone traffic control procedures, the Depart-ment will determine the specific requirements for each procedure with regard to conditions such as the hours permitted for the procedure according to traf-fic volumes, the physical characteristics and conditions unique to the road-way, and the work activities.

610.2

610.2 Materials

610.2 None specified.

610.3

610.3 Equipment

610.3 Ensure that background color of personal protective apparel is fluorescent Orange-Red.

610.3 Ensure that the equipment necessary for the proper construction of the work is on site, in acceptable working condition, and approved by the RCE as to both type and condition before the start of work under this section. Provide sufficient equipment to enable prosecution of the work in accordance with the project schedule and completion of the work in the specified time.

610.4

610.4 Construction

610.4.1

610.4.1 Flagging Operations

610.4.1.1

610.4.1.1 General

610.4.1.1 Use a flagging operation to control the flow of traffic when two opposing directions of traffic must share a common travel lane. A flagging operation may be necessary during a lane closure on a two-lane, two-way roadway, an intermittent ramp closure, or an intermittent encroachment of equipment onto a portion of the roadway. Utilize flagging operations to direct traffic around work activities and maintain continuous traffic at reduced speeds on low-volume, low-speed roadways when determined to be appropriate by the RCE.

610.4.1.2 610.4.2.1

610.4.1.2

610.4.1.2 Requirements

610.4.1.2 Ensure that flagging operations have the appropriate signing, equipment, and trained personnel. Install all essential signs, including the "Flagger" sign (W20-7a-48), in advance of each flagger station. Ensure that flaggers con-duct themselves and the operation as directed by the Specifications, the MUTCD, SCDOT Flaggers Handbook, and the RCE. Failure by the flaggers to conduct the operation properly or without the flagger signs is considered as failure to provide traffic control as required.

610.4.1.2 Erect all signs relative to the operation before initiation of the operation and immediately remove or cover such signs upon termination of the operation.

Station each flagger not further than 300 feet from the end of the lane closure that requires a flagging operation. Equip each flagger with a Stop/Slow pad-dle. Do not use flags except during emergency situations. Failure to conduct the operation properly within all requirements as set forth by the Specifica-tions, the MUTCD and the SCDOT Flaggers Handbook is deemed as failure to provide the traffic control as required and shall result in immediate suspen-sion of all work activities requiring the flagging operation until the condition is corrected.

610.4.1.2 During flagging operations, maintain the proper array of advance warning signs in-place for each approach at all times that a flagging operation is in place and active. When necessary to relocate the flagger station while ac-tively maintaining the flagging operation, install an additional array of advance warning signs at the new location for the flagger station and complete the relocation of the flagger station prior to removing the existing array of advance warning signs. Always maintain the flagger station within 500 feet of the "Flagger" (W20-7a-48) symbol sign of the array of advance warning signs.

610.4.1.2 During nighttime flagging operations, supplement the array of advance warning signs with a trailer-mounted changeable message sign for each ap-proach. These changeable message signs are not required during daytime flagging operations. Install the changeable message signs 500 feet in ad-vance of the advance warning sign arrays. Messages should be "Flagger Ahead" and "Prepare To Stop."

610.4.1.2 During nighttime flagging operations, ensure that flaggers wear safety ap-parel that meet the requirements of Subsection 610.3 and ANSI/ISEA 107, Standard Performance for Class 3 Risk Exposure, latest revision, and a fluo-rescent hardhat.

610.4.1.2 During nighttime flagging operations, illuminate each flagger station with any combination of portable lights, standard electric lights, existing street lights, etc., that provide a minimum illumination level of 108 Lx or 10 fc.

610.4.2

610.4.2 Lane Closures

610.4.2.1

610.4.2.1 General

610.4.2.1 Provide and install a specific array of traffic control devices to channelize traffic during closure of a travel lane of a multilane roadway and to delineate

610.4.2.2 610.4.2.2 the travel lanes open to traffic.

610.4.2.2

610.4.2.2 Requirements

610.4.2.2 Traffic control setups differ for daytime and nighttime lane closures. Do not use daytime lane closure setups during the hours of darkness or for the dura-tion of weekends and holidays. Install nighttime lane closure setups when lane closures are required during the hours of darkness or for the duration of weekends and holidays. Observe all time restrictions for lane closures as required by the Department.

610.4.2.2 Install Type II barricades, not less than 3 feet wide, for the taper sections and drums or cones for the tangent sections of lane closures. Ensure that standard traffic cones installed on Interstate highways have a minimum height of 36 inches.

610.4.2.2 Use standard traffic cones within the tangent sections of daytime lane clo-sure setups and use portable plastic drums or oversized traffic cones in the tangent sections of nighttime lane closure setups. Do not use standard traffic cones during nighttime lane closures.

610.4.2.2 Convert a daytime lane closure setup to a nighttime lane closure setup whenever circumstances prohibit removal of a daytime lane closure before entering nighttime conditions. Replace the standard traffic cones with port-able plastic drums or oversized traffic cones.

610.4.2.2 Always supplement lane closures on multilane facilities with advance warn-ing arrow panels. Install, maintain, and operate the arrow panels as specified by these specifications. Display the Caution Mode on arrow panels operating beyond 250 feet from the end of the taper within the tangent section of a closed lane. Always display the Caution Code on arrow panels operating within shoulder closures.

610.4.2.2 Use a truck equipped with a truck-mounted changeable message sign when reducing the number of travel lanes during each lane closure on Inter-state highways and high-volume, high-speed primary multilane facilities with paved shoulders. Ensure that the truck-mounted changeable message sign displays the message "Prepare To Stop". In the event traffic backs up, place the truck, manned with an operator, on the shoulder, which remains not less than 2000 feet in advance of the traffic queue. When the development of a traffic queue is not evident or the traffic queue has dissipated, locate the truck in a predetermined area on the project site approved by the RCE, where the truck is not visible to passing motorist. Do not place the truck on the shoulder of the roadway without an operator. Failure to provide the truck-mounted changeable message sign for lane closures is considered as failure to provide traffic control required.

610.4.2.2 If work is being conducted at two different locations at the same time in the same travel lane, separate the two locations by not less than 2 miles from the end of the first lane closure to the beginning of the taper of the second lane closure.

610.4.2.2 610.4.3.2

610.4.2.2 When work is being conducted at two different locations at the same time, do not close one travel lane at one location and a different travel lane at the other location unless the locations are more than 4 miles apart. Whenever separate work locations are less than 4 miles apart, conduct work at the two locations in the same travel lane unless otherwise directed by the Special Provisions and/or the RCE.

610.4.2.2 On an Interstate highways, use a lane closure procedure to conduct work or to place equipment in the shoulder within 10 feet of the near edge of the adjacent travel way.

610.4.2.2 On primary and secondary roads, use a lane closure procedure to conduct work or to place equipment in the shoulder within 1 foot of the near edge of the adjacent travel way.

610.4.2.2 These interval restrictions between lane closures apply to lane closures on the same project, contiguous projects, and projects that overlap in any man-ner and apply to all entities, including the Department, the Contractor, sub-contractors, utility companies, municipalities, etc. Failure to observe these interval restrictions is considered as failure to provide traffic control as re-quired.

610.4.2.2 Coordinate lane closure installations on contiguous projects or projects that overlap in any manner as directed by the RCE unless otherwise directed by the Plans and the Special Provisions.

610.4.2.2 Restrict the length of a lane closure to a maximum distance of 2 miles unless otherwise directed by the Plans, the Special Provisions, and the RCE.

610.4.2.2 Do not use lane closures on high-volume roadways during peak traffic peri-ods unless otherwise directed. Before installing a lane closure on a roadway with high-volume commuter traffic, acquire RCE approval of the proposed hours for the lane closure.

610.4.3

610.4.3 Shoulder Closures

610.4.3.1

610.4.3.1 General

610.4.3.1 Provide and install the specific array of traffic control devices to close the shoulder area of a roadway to traffic.

610.4.3.2

610.4.3.2 Requirements

610.4.3.2 Comply with specific shoulder closure requirements according to traffic volumes in the adjacent travel lanes, physical characteristics, and conditions unique to the roadway, and the work activities. If traffic backups develop and deemed excessive by the RCE, suspend work conducted under a shoulder closure. The hourly restrictions for lane closures also apply to work activities conducted under a shoulder closure within 15 feet of the near edge of an adjacent travel lane. Adhere to all shoulder closure restrictions as directed by the Specifications, the Plans, and the RCE.

610.4.3.2 610.4.4.1

610.4.3.2 On Interstate highways, do not conduct work within the limits of a paved shoulder or within 10 feet of the near edge of an adjacent travel lane under a shoulder closure. Conduct work that may require the presence of personnel, tools, equipment, materials, vehicles, etc., within the limits of a paved shoul-der or within 10 feet of the near edge of an adjacent travel lane under a lane closure setup.

610.4.3.2 On primary and secondary roadways, do not conduct work within one foot or less of the near edge of an adjacent travel lane under a shoulder closure.

Conduct work that may require the presence of personnel, tools, equipment, materials, vehicles, etc., within one foot of the near edge of an adjacent travel lane under a lane closure setup.

610.4.3.2 Do not substitute oversized traffic cones for portable plastic drums during nighttime shoulder closures.

610.4.3.2 When working in an outside shoulder area within 30 feet of an adjacent travel lane, close the adjacent shoulder as directed by the Typical Traffic Con-trol Standard Drawings. Use "Case 1" whenever conducting work or occupy-ing the shoulder beyond the restricted area, which is 1 foot (for primary and secondary roads) or 10 feet (for Interstate highways) from the near edge of the adjacent travel lane, but within 15 feet of the near edge of the adjacent travel lane. Use "Case 2" whenever conducting work between 15 to 30 feet of the near edge of the adjacent travel lane. Install a lane closure instead of a shoulder closure, unless otherwise directed by the RCE, when any work re-quires encroaching within the restrictive area, 1 foot or 10 feet from the near edge of the adjacent travel lane as specified above.

610.4.3.2 When working in a grassed median area within 30 feet of a travel lane, close the adjacent shoulder as directed by the Typical Traffic Control Stan-dard Drawings. If the median area work is within 30 feet of both adjacent travel lanes, close both adjacent shoulders. Use "Case 1" whenever conduct-ing work or occupying the area beyond the restrictive area, 1 foot or 10 feet of the near edge of the adjacent travel lane as specified above, but within 15 feet of the near edge of the adjacent travel lane. Use "Case 2" whenever conducting work between 15 to 30 feet of the near edge of the adjacent travel lane. Apply the "Case 1" and "Case 2" requirements to each adjacent travel lane flanking the median area work. Install a lane closure instead of a shoul-der closure, unless otherwise directed by the RCE, when any work requires encroaching within the restrictive area, 1 foot or 10 feet of the near edge of the adjacent travel lane as specified above.

610.4.4

610.4.4 Mobile Operations

610.4.4.1

610.4.4.1 General

610.4.4.1 Use specific traffic control devices and specifically equipped vehicles speci-fied herein during mobile operations on roadways open to traffic. Maintain the minimum requirements for traffic control devices and equipment on two-lane, two-way routes, multilane primary routes, and Interstate highways as speci-fied herein.

610.4.4.1 610.4.4.2.3

610.4.4.1 Use traffic control setups for mobile operations during the application and removal operations for pavement markings and raised pavement markers.

610.4.4.2

610.4.4.2 Requirements

610.4.4.2.1

610.4.4.2.1 General

610.4.4.2.1 Install, operate, and maintain all advance warning arrow panels, truck-mounted attenuators, and truck-mounted changeable message signs as re-quired by these specifications, the manufacturer’s specifications, the SCDOT Standard Drawings, the Plans, and the RCE.

610.4.4.2.1 Maintain functional two-way radio communications between all vehicles in the mobile operation train.

610.4.4.2.2

610.4.4.2.2 Two-Lane, Two-Way Roadways

610.4.4.2.2 Ensure that the lead vehicle maintains a distance of 100 to 500 feet ahead of the work vehicle. Ensure that the lead vehicle has an amber re-volving flashing dome light and a 48-inch X 48-inch "One Lane Road Ahead" sign (W20-4-48-A) mounted on top of the vehicle. During the hours of darkness, ensure that the lead vehicle also has an approved advance warning arrow panel operating in the Caution Mode mounted on top of the vehicle. Use of the advance warning arrow panel is not required during daytime operations. Ensure that the sign and the advance warning arrow panel face oncoming traffic.

610.4.4.2.2 Ensure that the work vehicle has an approved advance warning arrow panel operating in the Caution Mode and may be supplemented with an approved truck-mounted attenuator.

610.4.4.2.2 Ensure that a shadow vehicle maintains a distance of 150 to 300 feet behind the work vehicle and has an approved advance warning arrow panel operating in the Caution Mode and an approved truck-mounted attenuator.

610.4.4.2.2 Use of an optional second shadow vehicle may be provided. Operate the second shadow vehicle 500 to 1000 feet behind the initial shadow vehicle.

Ensure that the second shadow vehicle has an approved advance warning arrow panel operating in the Caution Mode and an approved truck-mounted attenuator.

610.4.4.2.2 Ensure that the distances between vehicles are within the ranges specified above at all times.

610.4.4.2.3

610.4.4.2.3 Multilane Primary Routes

610.4.4.2.3 Ensure that the work vehicle has an approved advance warning arrow panel displaying a flashing arrow and may be supplemented with an approved truck-mounted attenuator.

610.4.4.2.3 Ensure that the first shadow vehicle maintains a distance of 150 to 300 feet behind the work vehicle and has an approved advance warning arrow panel displaying a flashing arrow and an approved truck-mounted attenuator. Ad-just the distance intervals between the first shadow vehicle and the work ve-

610.4.4.2.3 610.4.4.2.4 hicle to compensate for horizontal and vertical curves and any other condi-tions that may hinder or obstruct the sight distance between the vehicles.

610.4.4.2.3 Ensure that a second shadow vehicle maintains a distance interval of 500 to 1000 feet behind the first shadow vehicle in accordance with the parame-ters provided below, has an approved truck-mounted changeable message sign, and has an approved truck-mounted attenuator. Ensure that the truck-mounted changeable message sign flashes alternately to read "Right (Left) Lane," "Closed Ahead." Operate the second shadow vehicle on the shoulder adjacent to the travel lane with the work train where paved shoulders or earth shoulders wide enough to accommodate vehicles. Operate the second shadow vehicle within the same travel lane as the work train when the shoul-ders are too narrow to accommodate vehicles, the shoulders are structurally inadequate, or curb and gutter is present. During operations in the left travel lane, avoid placing the second shadow vehicle in a paved median where op-posing left turn traffic may be encountered. The truck-mounted changeable message sign may display a flashing arrow when the second shadow vehicle must operate in the travel lane. The flashing arrow display on the truck-mounted changeable message sign is permissible only when the second shadow vehicle must operate in the travel lane. Do not use the flashing arrow display on the truck-mounted changeable message sign when the second shadow vehicle operates on the shoulder.

610.4.4.2.3 Adjust the distance intervals between the second shadow vehicle and the first shadow vehicle to compensate for horizontal and vertical curves and any other conditions that may hinder or obstruct the sight distance between the vehicles. Restrict any adjustments between the second shadow vehicle and the first shadow vehicle to a designated range of variable distances. These variable distances are 250 to 500 feet in areas where the speed limit is 45 mph or less, and 500 to 1000 feet in areas where the speed limit is 50 mph or greater.

610.4.4.2.3 Ensure that the distances between vehicles are within the ranges specified at all times.

610.4.4.2.4

610.4.4.2.4 Interstate Highways

610.4.4.2.4 Ensure that the work vehicle has an approved advance warning arrow panel displaying a flashing arrow and may be supplemented with an approved truck-mounted attenuator.

610.4.4.2.4 Ensure that the first shadow vehicle maintains a distance of 250 to 500 feet behind the work vehicle and has an approved advance warning arrow panel displaying a flashing arrow and an approved truck-mounted attenuator. Ad-just the distance intervals between the first shadow vehicle and the work ve-hicle to compensate for horizontal and vertical curves and any other condi-tions that may hinder or obstruct the sight distance between the vehicles.

610.4.4.2.4 Ensure that a second shadow vehicle maintains a distance interval of 750 to 1500 feet behind the first shadow vehicle. Ensure that the second shadow vehicle has an approved advance warning arrow panel displaying a flashing

610.4.4.2.4 610.4.5.2.1 arrow and an approved truck-mounted attenuator. Adjust the distance inter-vals between the second shadow vehicle and the first shadow vehicle to compensate for horizontal and vertical curves and any other conditions that may hinder or obstruct the sight distance between the vehicles.

610.4.4.2.4 Ensure that a third shadow vehicle maintains a distance of 750 to 1500 feet behind the second shadow vehicle. Ensure that the second shadow vehicle has an approved truck-mounted changeable message sign and an approved truck-mounted attenuator. Ensure that the truck-mounted changeable mes-sage sign flashes alternately to read "Right (Left) Lane," "Closed Ahead."

Operate the third shadow vehicle on the right shoulder where paved shoul-ders wide enough to accommodate vehicles or within the same travel lane as the work train when the shoulders are too narrow to accommodate vehicles, the shoulders are structurally inadequate, or curb and gutter is present. En-sure that the truck-mounted changeable message sign displays a flashing arrow when the third shadow vehicle must operate in the travel lane. The flashing arrow display on the truck-mounted changeable message sign is permissible only when the third shadow vehicle must operate in the travel lane. Do not use the flashing arrow display on the truck-mounted changeable message sign when the third shadow vehicle operates on the shoulder. Ad-just the distance intervals between the third shadow vehicle and the second shadow vehicle to compensate for horizontal and vertical curves and any other conditions that may hinder or obstruct the sight distance between the vehicles.

610.4.4.2.4 Ensure that the distances between vehicles are within the ranges specified at all times.

610.4.5

610.4.5 Road Closures

610.4.5.1

610.4.5.1 General

610.4.5.1 Use the specific array of traffic control devices specified herein to close a roadway for a period ranging from 20 minutes to a long term or permanent closure. Apply the requirements specified herein whenever a road closure is necessary.

610.4.5.2

610.4.5.2 Extended Road Closures

610.4.5.2.1

610.4.5.2.1 General

610.4.5.2.1 Use the specific array of traffic control devices specified herein to close a roadway for a period ranging from days to a permanent closure. Install the appropriate array of traffic control devices on each approach as necessary to ensure complete closure of the specific area to traffic.

610.4.5.2.1 Install and maintain all traffic control devices as required by these specifica-tions, the manufacturer's specifications, SCDOT Standard Drawings, the MUTCD, the Plans, and the RCE.

610.4.5.2.2 610.4.6.1

610.4.5.2.2

610.4.5.2.2 Extended Road Closure of Existing Roadway

610.4.5.2.2 Use this specific array of traffic control devices to close an existing roadway that has been open to traffic. Provide and install traffic control devices that include Type III barricades supplemented with appropriate signs placed at the nearest intersection that provides an alternate route, but not necessarily the intended detour, advanced warning signs, and Type III barricades installed across the entire roadway at the point of closure. Supplement the advance warning signs and the Type III barricades at the point of closure with ap-proved Type B high intensity flashing warning lights.

610.4.5.2.3

610.4.5.2.3 Extended Road Closure of New Roadway Alignment

610.4.5.2.3.1

610.4.5.2.3.1 General

610.4.5.2.3.1 Use the specific array of traffic control devices specified herein to close a new roadway alignment that has not been open to traffic. Provide and install traffic control devices that include Type III barricades supplemented with the appropriate signs installed across the roadway at the beginning of the new roadway alignment. No warning lights are required to supplement these bar-ricades.

610.4.5.2.3.2

610.4.5.2.3.2 Requirements

610.4.5.2.3.2 In areas where an existing roadway alignment is being relocated, install portable plastic drums adjacent to the edge of the existing roadway at inter-vals not to exceed 35 feet at the beginning of the rough grading of the new roadway alignment. Maintain the drums in-place until Type III barricades are installed across the new roadway alignment. However, depending upon field conditions such as the roadway geometry, it may be prudent to maintain the drums in-place until the new roadway alignment is opened to traffic. The RCE will determine when the drums may be removed.

610.4.5.2.3.2 Upon beginning the fine grading of the new roadway alignment in the area adjacent to the existing roadway alignment, install Type III barricades sup-plemented with the appropriate signing. The traffic control setups for these barricades require a minimum number of 3 to 5 Type III barricades as neces-sary to cross the entire new roadway alignment as illustrated in the SCDOT Standard Drawings. Field conditions may require additional barricades to completely close the new roadway alignment. Maintain these barricades until the new roadway alignment is opened to traffic.

610.4.6

610.4.6 Temporary Road Closures

610.4.6.1

610.4.6.1 General

610.4.6.1 Use the array of traffic control devices specified herein and law enforce-ment officers to temporarily close a roadway for brief periods not to exceed 20 minutes and preferably shorter. Whenever temporary road closures are nec-essary, apply all the requirements specified herein.

610.4.6.2 610.4.7.2

610.4.6.2

610.4.5.2 Requirements

610.4.6.2 Arrange all equipment and crews to keep each temporary road closure limited to no longer than 20 minutes. Allow stopped traffic to proceed and clear the area after each temporary closure before stopping traffic again and make all reasonable efforts to expedite the work and minimize interference with traffic.

610.4.6.2 Use the assistance of the South Carolina Highway Patrol when it is neces-sary to stop traffic. Coordinate the traffic control with the RCE and the High-way Patrol.

610.4.6.2 Conduct temporary road closures as directed by these specifications, the

Special Provisions, and the RCE. Permit temporary road closures at times of the lowest traffic volumes as determined by the Special Provisions and the RCE. The hourly restrictions for lane closures at the location intended for closure also apply to any temporary road closures. Prohibit temporary road closures during holidays, holiday weekends, or special events unless other-wise specified.

610.4.6.2 Provide a truck equipped with a truck-mounted changeable message sign and an approved truck-mounted attenuator when temporarily closing the mainline roadway on Interstate highways and high-volume, high-speed multi-lane facilities with paved shoulders. Ensure that the truck-mounted change-able message sign displays a message to read "Prepare To Stop." Immedi-ately upon development of a traffic queue, place the truck, manned with an operator, on the shoulder, to remain not less than 2000 feet in advance of the traffic queue. Do not place the truck on the shoulder of the roadway without an operator. Failure to provide the truck-mounted changeable message sign is considered as failure to provide the required traffic control.

610.4.6.2 Provide notice to the RCE not less than 2 weeks prior to any major traffic interruption such as temporary road closure.

610.4.7

610.4.7 Pacing Operations

610.4.7.1

610.4.7.1 General

610.4.7.1 Use the array of traffic control devices specified herein, law enforcement officers, and law enforcement vehicles to temporary control the flow of traffic through a defined area without creating a complete cessation of the traffic flow. Obtain prior approval from the RCE before using a pacing operation as an alternative to a complete cessation of traffic operations. Whenever pacing operations are implemented, apply all the requirements specified herein.

610.4.7.2

610.4.7.2 Requirements

610.4.7.2 Arrange all equipment and crews to conduct and complete the necessary work tasks prior to the arrival of the controlled traffic flow. Ensure that the time frame to conduct the necessary work is limited to not longer than 20 minutes. Allow the controlled traffic flow to proceed, clear the area after each event, and resume normal traffic flow for the location prior to initiating a sub-

610.4.7.2 610.4.8.2 sequent pacing operation. Make all reasonable efforts to expedite the work and minimize interference with traffic.

610.4.7.2 Use the assistance from the South Carolina Highway Patrol when it is nec-essary to implement a pacing operation. Coordinate the traffic control with the RCE and the Highway Patrol.

610.4.7.2 Assistance from the Highway Patrol is required when a pacing operation is implemented. Have Highway Patrol troopers intercept traffic in advance of the project site at a distance sufficient to provide a work period of 20 minutes or less. Close all on-ramps within the effected area in advance of the project site until the queue of controlled traffic has passed. Station Highway Patrol troopers at the point of closure of each ramp.

610.4.7.2 Conduct all pacing operations as directed by these specifications, the Spe-cial Provisions, and the RCE. Use pacing operations at times of the lowest traffic volumes as determined by the Special Provisions and the RCE. The hourly restrictions for lane closures at the subject location also apply to pacing operations. Do not use pacing operations during holidays, holiday weekends, or special events unless otherwise specified.

610.4.7.2 Provide a truck equipped with a truck-mounted changeable message sign and an approved truck-mounted attenuator when pacing traffic on Interstate highways and high-volume, high-speed multilane facilities with paved shoul-ders. Ensure that the truck-mounted changeable message sign displays a message to read "Prepare To Stop." If a traffic queue develops, immediately place the truck, manned with a sign operator, on the shoulder to stay not less than 2000 feet in advance of the traffic queue. Prohibit placing the truck on the shoulder of the roadway without an operator. Failure to provide the truck-mounted changeable message sign is considered as failure to provide the required traffic control.

610.4.7.2 Notify the RCE not less than 2 weeks prior to any major traffic interruption such as a pacing operation.

610.4.8

610.4.8 Detours

610.4.8.1

610.4.8.1 General

610.4.8.1 Use the array of signs installed to direct and guide traffic around a closed portion of an Interstate, primary, or secondary route. Conduct the detour by relocating traffic onto an alternate route and returning the traffic to the closed route beyond the closed portion of the roadway.

610.4.8.2

610.4.8.2 Requirements

610.4.8.2 If the detour route is not specified in the Plans or special provision, select roads for the detour that have a structure and geometry to safely sustain the type and amount of detoured traffic. Ensure that the route has adequate sight distances at intersections, no bridges with posted weight limitations, 12-foot travel lanes, adequate pavement markings, and a good pavement surface.

Minimize the length of the detour meeting the aforementioned requirements.

Depending on the type and amount of detoured traffic, consider other factors

610.5 610.6 for route selection such as school locations, areas of reduced speed limits, and traffic control at intersections that would be impacted by the detour.

610.5

610.5 Measurement

610.5 Unless otherwise specified, flagging operations, lane closures, shoulder closures, mobile operations, temporary road closures, extended road clo-sures, pacing operations, and detours are included in the lump sum pay item Traffic Control. No specific measurements are made for items required for these traffic control operations unless the Contract includes specific pays items for such work.

610.5 In the case of an extended road closure of an existing roadway, as speci-fied in Subsection 610.4.5.2.2, separate measurements are made of quanti-ties for Type III barricades, permanent construction signs, and Type B flash-ing warning lights. Type III barricades installed and accepted are measured in accordance with Subsection 604.5. Only the length of the actual barricade is measured. The spaced between the barricades is excluded. Permanent construction signs both ground and barricade mounted (regardless of the type of sign stratum) installed and accepted are measured in accordance with Subsection 605.5. Type B flashing warning lights installed and accepted are measured in accordance with Subsection 608.5.

610.6

610.6 Payment

610.6 Payment for accepted quantity for each pay item, measured in accordance with Subsection 610.5, is determined using the contract unit bid price for the applicable item.

610.6 Payment for Traffic Control is full compensation for providing, installing, and maintaining flagging operations, lane closures, shoulder closures, mobile operations, temporary road closures, extended road closures, pacing opera-tions, and detours as specified or directed and includes and all materials, labor, hardware, equipment, tools, supplies, transportation, incidentals, and miscellaneous items necessary to conduct the operations as specified by the Plans, the Specifications, the manufacturer’s specifications, the SCDOT Standard Drawings or as directed by the RCE.

610.6 Payment for Traffic Control also includes providing, installing, removing, relocating signs, vehicles, truck-mounted advance warning arrow panels, truck-mounted attenuators, truck-mounted changeable message signs, proper safety attire, Stop/Slow paddles, trained personnel and other traffic control devices required to protect traffic and the work zone.

610.6 In the case of an extended road closure of an existing roadway, as speci-fied in Subsection 610.4.5.2.2, a separate payment is made for accepted quantities for Type III barricades, permanent construction sign, and Type B flashing warning lights. Type III barricades are paid for in accordance with Subsection 604.6. Permanent construction signs both ground and barricade mounted (regardless of the type of sign stratum) are paid for in accordance with Subsection 605.6. Type B flashing warning lights are paid for in accor-

610.6 610.6 dance with Subsection 608.6.

610.6 Payment for each pay item includes all direct and indirect costs and ex-penses required to complete the work.

610.6 There are no pay items included under this section.