630Construction Zone Traffic Control

Construction Zone Traffic Control

Description

630.01This work consists of furnishing, installing, moving, maintaining, and removing

temporary traffic signs, advance warning arrow panels, flashing beacon (portable), barricades, channelizing devices, delineators, temporary traffic signals, temporary portable rumble strips, mobile pavement marking zones, temporary emergency pull-off areas, masking and unmasking existing signs in construction zones, concrete barriers, and Automated Flagging Assistance Devices (AFAD) as required by the Manual on Uniform Traffic Control Devices for Streets and Highways and the Colorado Supplement thereto, per the Contract. Devices shall comply with the performance criteria contained in NCHRP Report 350 (only applicable for devices developed before 2011) or Manual for Assessing Safety Hardware (MASH) (acceptable for all devices). Devices temporarily not in use shall, as a minimum, be removed from the shoulder area. Moving will include devices removed from the project and later returned to use. This work also includes Traffic Control Management, flagging, and pilot car operation.

This work consists of providing traffic pacing operation to motorists within the project area, as shown on the plans. It includes locating traffic related incidents, providing roadside assistance, and clearing the traffic related incidents. The use of law enforcement officers shall be integrated into the Rolling Roadblock operations.

Materials

630.02Signs and Barricades. Construction traffic sign and barricade materials shall conform

to the applicable portions of Section 614 with the following exception: Sign panels may be fabricated from plywood, aluminum, steel, or other suitable materials provided they are stable and durable enough to meet the other requirements of Section 614. Traffic control devices deemed inadequate by the Engineer shall not be used and shall be removed from the project site.

Temporary sign support assembly shall be timber, perforated square metal tubing inserted into a larger base post or slip base, or perforated metal U-channel with a slip base. The temporary sign support assembly shall conform to NCHRP Report 350 (only applicable for sign support assemblies developed before 2011) or MASH (acceptable for all sign support assemblies), and AASHTO requirements regarding temporary sign supports during construction. If U-Channel posts with a slip base are selected, they shall be used only in multi-post applications, as shown on Standard PlanS-630-4. Retro-reflective sheeting shall conform to the requirements of subsection 713.04. Retro-reflective sheeting types shall be as defined in the CDOT Retroreflective Sheeting Materials Guide. Retro-reflective sheeting shall be one of the types specified for the particular application in Table 630-1. Retro-reflective sheeting for all signs requiring an orange background shall be Fluorescent.

630.02

Table 630-1 Retroreflective Sheeting Types

Type VI Type (Roll-up Sheeting Type IV Fluorescent sign * material) Application Work Zone Work Zone Work Zone All Orange Construction Signs X Orange Construction Signs that are used only during daytime X X hours for short term or mobile operations Barricades (Temporary) X X Vertical Panels X X Flaggers Stop/Slow Paddle X X Drums and Tubular Markers# X X Non-orange Fixed Support signs X with prefix “W” Special Warning Signs X STOP sign (R1-1) YIELD sign (R1-2) WRONG WAY sign (R5-1a) X DO NOT ENTER sign (R5-1) EXIT sign (E5-1a) DETOUR sign (M4-9) or (M4-10) X All other fixed support signs X X All other signs used only during X X working hours All other signs that are used only during daytime hours for X X X short term or mobile operations

Table 630-1 Notes: * Fluorescent Sheeting shall be of a brand that is on the CDOT Approved Products List. # Drum and Tubular Marker sheeting shall be manufactured for flexible devices, and sheeting materials shall conform to Section 713.  Fixed support signs are defined as all signs that must remain in use outside of working hours. They shall be mounted per Standard PlanS-630-1.  RS 24 only.  White only.  For projects advertised before September 1, 2017, Type IV or Fluorescent sheeting will be permitted. For projects advertised on or after September 1, 2017, only Fluorescent sheeting will be permitted.

630.03

The Contractor shall provide sign panel legend for standard signs per “Standard Highway Signs” published by the FHWA and the Colorado Supplement thereto, and sign panel legend for special signs per the detailed sign layouts provided by the Engineer.

Variable Message Signs (Portable) shall conform to the requirements of the Project Special Provision, Revision of Section 630, Portable Message Sign Panel.

630.03Electronic Advance Warning Signs. Advance warning flashing or sequencing arrow

panels shall be furnished of a size as required by project conditions and shall meet the following requirements:

Table 630-2 Requirements for Electronic Advance Warning Signs Minimum Minimum Minimum Type Number of Panel Legibility Size Lamps Distance A 24"x48" 12 1/2 mile B 30"x60" 13 3/4 mile C 48"x96" 15 1 mile

The panel face shall be rectangular in shape, solid construction and shall be finished nonreflective black. The panels shall be mounted on a vehicle, trailer, or other suitable support. Vehicle-mounted panels shall be provided with remote controls.

Arrow panels shall have the capability of the following mode selection: left arrow or chevron, right arrow or chevron, left and right arrow, and caution. The caution mode consists of four or more lamps, arranged in a pattern that will not indicate a direction.

Arrow panels shall include an automatic photocell sensor type signal lamp dimmer with manual override and shall be capable of minimum 50 percent dimming from rated lamp voltage.

630.04Temporary Traffic Signals. Temporary traffic signals must meet the physical display

and operational requirements of conventional traffic signals. A minimum of two signal faces shall be provided for each approach and each signal face shall consist of three 12-inch sections. At railroad grade crossing locations, one signal face with three 8-inch sections shall be visible from each rail approach. The traffic signal controllers shall conform to the requirements of subsection 614.08(b) and shall be capable of two-phase operation, or more if specified on the plans, with all-red timing intervals.

The Contractor shall submit a list of equipment proposed to be used. The equipment shall be identified by trade name, size and number. Material deemed inadequate by the Engineer shall not be used.

630.05Traffic Cones. Traffic cones shall not be used outside of working hours unattended

The minimum cone height shall be 28 inches. However, when they are used on freeways, at nighttime, or when specified in the Contract, the minimum height shall be 36 inches.

630.06 When traffic cones are used during nighttime, they shall be reflectorized. The reflectorized material shall be selected from the Colorado Approved Products List and shall have a smooth, sealed outer surface that will display the same approximate color day and night. Reflectorization of cones shall be provided by a white band at least 6 inches wide placed no more than 3 to 4 inches from the top, and an additional white band, 4 inches wide, placed a minimum of 2 inches below the 6-inch band.

Tubular markers shall be 3 to 3 1/2 inches in diameter, shall be 36 inches plus or minus 1/2 inch in height, predominantly orange in color, and shall be reflectorized.

630.06Channelizing Device (Fixed). Channelizing Device (Fixed) shall be 36 inches plus

or minus 1/2 inch in height and 3 to 3 1/2 inches in width for the surface facing traffic. The shape of the device is immaterial as long as it can accommodate the striping pattern and functions as described below. Reflectorization shall be alternating 4 to 6 inches wide orange and white stripes slanting downward at a 45-degree angle toward the side where traffic will pass. The striping shall start at the top and extend downward at least 32 inches. Reflective sheeting shall be Type IV. These devices shall be manufactured of flexible high-impact resistant material, shall be physically attached to the pavement, and shall be capable of returning to a vertical position after impact by a vehicle. The brand name and model of the Channelizing Device (Fixed) shall be submitted to the Engineer for approval before use.

630.07Temporary Channelizing Devices

requirements contained in NCHRP Report 350 (only applicable for vertical panels developed before 2011) or MASH (acceptable for all vertical panels) and shall meet MUTCD requirements for vertical panels. Vertical panels shall be retroreflectorized with Type IV sheeting, per subsection 630.02. The stackable vertical panels shall have the following properties: Table 630-3 Requirements for Stackable Vertical Panels Property Specification Panel Material Low density polyethylene Orange and white stripes with Color orange or white frame and black ballast Vertical Panel 24, 36, 42 in Height Ballast Type* Rectangular or Square Ballast Weight* 9 - 30 lb Table 630-3 Notes: *The ballast type and weight shall be as shown in the contract or as approved by the Engineer.

Markings for vertical panels shall be alternating orange and white retro-reflective stripes, sloping downward at an angle of 45 degrees in the direction of vehicular traffic. The width of the stripes shall conform to the requirements of the MUTCD.

630.08

Vertical panels shall be retroreflectorized with Type IV Sheeting. The stackable vertical panels shall be selected from the Department’s Approved Products List and shall have a smooth, sealed outer surface that will display the same approximate color day and night.

requirements contained in NCHRP Report 350 (only applicable for stackable tubular markers developed before 2011) or MASH (acceptable for all stackable tubular markers) and shall conform to MUTCD requirements for tubular markers. The stackable tubular markers shall have the following properties: Table 630-4 Requirements for Stackable Tubular Markers

Property Specification Tubular Section Low density polyethylene Orange Tubular Marker with Color Black Base Height (min.) 42 in Rectangular, Octagonal or Ballast Type* Square Ballast Weight* 15 - 40 lb

Table 630-4 Notes: *The ballast type and weight shall be as shown in the contract or as approved by the Engineer.

Tubular Markers shall be retroreflectorized as shown in Table 630-1. The stackable tubular markers shall be selected from the Department’s Approved Products List and shall have a smooth, sealed outer surface that will display the same approximate color day and night.

thermoset cast urethane, and shall operate in temperatures ranging from 0 to 180 °F. The Contractor shall submit documentation from the manufacturer showing that the product meets all American Traffic Safety Services Association (ATSSA) and FHWA criteria for temporary portable rumble strips. The rumble strip shall be capable of being installed without adhesives or bolts and shall have a minimum weight of 105 pounds. The face of the rumble strip shall be a non-slip textured surface.

630.08Temporary Barrier Temporary Barrier shall comply with the crash test requirements

contained in NCHRP Report 350 (for devices manufactured before 2020) or MASH (acceptable for all temporary barrier). Retroreflectorization is required on all temporary barrier according to Standard PlansS-612-1 and M-606-14 and shall meet material qualities per Section 713. All barrier types shall be designed to accommodate appropriate end treatments, transitions and delineation devices. Previously damaged barrier shall not be installed, and barrier damaged after installation shall be removed and replaced or repaired (for minor damage not affecting design intent) per manufacturer.

630.09

Barrier as detailed in Standard Plan M-606-14.

Approved Product List. If used, metal barrier shall be made of galvanized steel. All non- concrete barrier types shall be designed to allow for proper drainage runoff. Barrier shall be installed and maintained according to manufacturer requirements and include all necessary components for installation. Product specific documentation pertaining to installation, maintenance, repair, removal, and inspection shall be provided by the Contractor before installation.

630.09General. All traffic control devices shall be provided with all components necessary

to comprise a complete installation. Traffic control devices deemed inadequate by the Engineer shall not be used and shall be removed from the project site. Work zone devices designated by FHWA as Category I, II, or III, shall comply with the performance criteria contained in NCHRP Report 350 (only applicable for devices developed before 2011) or MASH (acceptable for all devices). Devices designated as Category IV, including but not limited to portable or trailer-mounted devices such as flashing arrow panels, temporary traffic signals, area lighting supports, and changeable message signs are not required to meet NCHRP 350 or MASH requirements. Except for Category IV devices, the Contractor shall obtain and present to the Engineer the manufacturer’s written NCHRP 350 (only applicable for devices developed before 2011) or MASH (acceptable for all devices) certification for each work zone device before it is first used on the project. The Flashing Beacon (Portable) shall include all work and material necessary to complete the item. The beacon head, lens, signal lamp, flasher and electrical boxes and fittings shall conform to permanent flashing beacon requirements. The post or mounting method shall conform to construction traffic control materials. The flashing beacon shall be per subsection 614.06. Portable devices that require weight to prevent overturning shall be weighted with appropriately sized sandbags. Traffic control devices that are damaged, weathered, worn, or otherwise determined to be unacceptable, shall be replaced at the Contractor's expense. Delineator (Type) (Temporary) shall conform to Delineator (Type) described in Section 612. Undamaged Delineator (Type) (Temporary), when approved, may be used as Delineator (Type). Construction Requirements

630.10Transportation Management Plan. The Contractor shall prepare a Transportation

Management Plan for each phase of the project. The Contractor shall manage the work zone impacts of the Project per the Transportation Management Plan (TMP). For significant projects, the TMP shall consist of the Traffic Control Plan (TCP) included in the Contract, a Transportation Operations (TO) component, and Public Information (PI) requirements. The TCP addresses traffic safety and control through the work zone; the TO component shall address sustained operations and management of the work zone impact area; and the PI component requirements shall address communication with the public and concerned stakeholders. For non-significant projects, TMP shall consist of the TCP and other components as specified in the Contract. The proposed TMP shall be approved in writing by

the Engineer before the Contractor begins the corresponding phase of construction. The initial TMP shall be submitted at the Pre-construction Conference.

The project will be considered a significant project unless otherwise specified in the Contract.

The Contractor’s superintendent shall implement the TMP.

as shown in the Contract. To implement the TCP, the Contractor shall develop and submit a Method for Handling Traffic (MHT) for each different phase of construction, which shows the Contractor's proposed construction phasing and proposed traffic control devices consistent with the TCP. If at any time the Contractor desires to change the MHT, it shall be considered a different phase requiring a new MHT. Any major revisions to the TCP as determined by the Engineer must be authorized by a Contract Modification Order. Each approved MHT shall be signed by the prime contractor, the traffic control supervisor, and the Engineer before the corresponding phase of construction will be allowed to begin. The initial MHT shall be submitted at the Pre-construction Conference. The approved MHT shall include as a minimum the following:

advance construction signs and speed limit signs; method, length and time duration for lane closures; and location of flaggers and time duration of the flagging operation. Lane closures shall be kept to a minimum in both length and duration and cause a minimum of interference to the traveling public, consistent with the work being performed.

not limited to: construction signs; vertical panels; vertical panels with light; Type 1 and Type 2 barricades; Type 3 barricades; cones, drum channelizing devices; concrete barrier (temporary); advance warning flashing or sequencing arrow panels. Traffic control devices may be used for more than one operation or phase. However, all devices required for any particular phase must be detailed and tabulated for each phase.

include details of a mobile pavement-marking zone. The mobile pavement marking zone shall include, as a minimum, three operations groups as follows:

least one cone installation truck.

pickup.

following signs shall be used:

Table 630-5 Minimum Sign Requirements for Mobile Pavement-Marking Zone Highway/Painting/Next 60 inch by 36 inch __ Miles Highway/Painting/Ahead 48-inch Diamond Speed/Limit 48 inch by 60 inch

Truck mounted message boards may be used in lieu of temporary signs.

Groups 1 and 2 shall each be equipped with a truck-mounted Advance Warning Flashing or Sequencing Arrow Panel (C Type). Group 2 shall be equipped with a truck mounted impact attenuator. The impact attenuator shall be located on the rearmost vehicle of the group. A separate vehicle for this attenuator may be used. Each truck-mounted impact attenuator shall be certified by the manufacturer to be able to withstand a 62 MPH impact per NCHRP 350, Test Level 3(applicable only for truck-mounted impact attenuators developed before 2011) or MASH, Test Level 3 (acceptable for all truck-mounted impact attenuators). The cone setting truck and the cone pickup truck shall not be the same vehicle. Group 2 shall also be equipped with a truck mounted NO/PASSING/THRU/PAINTING/ZONE 48 inch by 60-inch sign. Group 3 shall place HIGHWAY/PAINTING/AHEAD signs on intersecting crossroads and interchange entrance ramps as the pavement marking operation approaches. If required, for spot locations, this group shall also provide flagging. All groups shall maintain radio communications to ensure appropriate advance warning and buffer distances are maintained for traffic. All groups shall clear the roadway every 15 minutes or as deemed necessary by the Engineer to allow traffic queues to pass. Traffic cone spacing shall be determined as required by the standard plans’ calculations based on current speed limits. Cone spacing shall not exceed 120 feet. Cones shall be placed a distance of 2 miles on the centerline. The distance and spacing may be adjusted, depending on traffic conditions and terrain, as determined by the Engineer.

MUTCD, Standard Plans, etc. for any devices incorporated into the MHT that are not included in the TCP provided by the Contract.

This plan shall also indicate the areas where equipment will be stored, vehicles parked, and construction signs and materials stored, if within the project limits. The Contractor shall ingress and egress the project at existing access points, including median crossings, shown on the plans, unless otherwise approved.

traffic.

structures in all areas covered by a proposed MHT meet or exceed the minimum clearances shown in Table 630-6. If the vertical clearance is less than what is shown for the particular condition in Table 630-6, the Contractor shall identify the location where this clearance cannot be met and provide an appropriate signing plan. If the existing vertical clearance is already less than what is shown in Table 630-6, the Contractor shall identify the location, but a signing plan will be required only if the clearance is to be reduced further. This information shall be included in the MHT and shall be submitted to the Engineer for approval a minimum of five days before the MHT is implemented.

shoulder in all areas covered by a proposed MHT is at least 17 feet. If this width cannot be maintained, the Contractor shall identify the location where this clearance cannot be met and provide an appropriate signing plan. If the existing width is already less than 17 feet, the Contractor shall identify the location, but a signing plan will be required only if the width is to be reduced further. This information shall be included in the MHT and shall be submitted to the Engineer for approval a minimum of five days before the MHT is implemented.

Table 630-6 Vertical Clearances to Structures

Highway Railway Overhead Between Underpasses Underpasses Wires Local Rural Roads 14 Feet 23 Feet#  Local Urban Streets 14 Feet 23 Feet#  Urban and Rural 14 Feet 23 Feet#  Collectors Freeways 16 Feet* 23 Feet#  Rural Arterial 16 Feet* 23 Feet#  Urban Arterial 16 Feet* 23 Feet#  Table 630-6 Notes: *Vertical clearance to sign trusses and pedestrian overpasses shall be 17 feet. # Measured from top of rail to bottom of highway structure. All railway clearances are subject to the individual railroad’s approval.  Communication and power lines of: 0 to 750 volts 18 Feet 750 to 22,000 volts 20 Feet 22,000 to 50,000 volts 22 Feet For voltages over 50,000 volts, increase clearance 1/2 inch for each 1000 volts over 50,000.

630.11

that the TO requirements are enforced throughout the work. The TO shall provide the following:

restore normal project operations

reduce the frequency and severity of such incidents.

at project acceptance. The report shall include cause and impact of delays, actions taken to mitigate incidents, why expected delays were exceeded, and how the situation can be avoided in the future.

Special Provision titled Revision of Section 626 – Public Information Services.

630.11Traffic Control Management. The contractor shall designate an individual, other

than the superintendent, to be the Traffic Control Supervisor (TCS). The Traffic Control Supervisor shall be certified as a worksite traffic supervisor by an authorized entity and shall have a current flagger certification from an authorized entity. A copy of the Traffic Control Supervisor's certifications shall be provided to the engineer at the pre-construction conference and shall be available at all times on the worksite.

The contractor’s superintendent, and all others serving in a similar supervisory capacity, shall have completed an approved traffic control supervisor training as offered by the authorized entities. The certifications of completion or certifications of achievement for all appropriate staff shall be submitted to the engineer at the pre-construction conference.

The Traffic Control Supervisor’s duties shall include:

per the traffic control plan.

operations, including those of subcontractors and suppliers that required traffic control operations.

activities with appropriate police, fire, and emergency responder agencies.

the work date. Work may be suspended pursuant to subsection 105.01 when diaries have not been submitted as required. The diary shall include the following information as a minimum:

• Date.

• The time of the traffic control inspection.

630.11

• Project number.

• Traffic control supervisor’s name and signature. • Description of all traffic control operations currently in place (lane closures, shoulder closures, pilot car operations, detours, etc.), including location, setup, and takedown time, and approved MHT number. • Types and quantities of traffic control devices used per the approved MHT. • List of flaggers and Uniformed Traffic Control (UTC) used, including the flaggers name, start time, stop time, flagger locations, and the number of flagging hours and UTC hours used. • Traffic control problems (traffic accidents, damaged, missing, or dirty devices) and corrective action taken. • Non-work time inspection notes, including non-work time designation, time of inspection, and corrective actions taken.

These inspections shall include at least one non-work time inspection (daytime inspection for primarily night work or nighttime inspection for primarily day work) per week if traffic control devices are present on the roadway. The TCS or another representative who is certified as a worksite traffic supervisor shall perform these inspections. The engineer may initiate a safety standdown for failure to complete any daily or nighttime inspections.

safety, and orderly movement of traffic. Have an up-to-date copy of the MUTCD, in-use fully signed copies of MHTs, and applicable standards and specifications available at all times on the project.

required to perform TCM during these meetings, the cost of the additional TCS will be incidental to the work.

A certified worksite traffic supervisor shall be responsible for traffic control management (TCM) on a 24-hour-per-day basis. The TCS or authorized designee shall be on the work site at all times when TCM is performed. The TCS shall be on call at all times. Upon request of the engineer, the TCS may be required to be on the project site at times other than normal working hours. During non-work periods, the TCS shall respond to the job site within 45 minutes of notification. The TCS may appoint a qualified representative to serve as the TCS for periods of time as approved by the engineer. The qualified representative shall be certified as a TCS and shall assume all duties and responsibilities of the TCS. The contractor shall maintain a 24-hour telephone number at which the TCS can be contacted. The TCS shall not act as a flagger except in an emergency or in relief for short periods of no more than 15 minutes per hour for scheduled flagger breaks. Each designated TCS shall have a flagger assigned to them to assist in their duties at all times as a TCS/TCS trainee (flagger) pair. The TCS trainee shall have a current flagger certification from an authorized entity. The TCS trainee shall not be allowed to give breaks to other flaggers, unless approved by the Engineer.

630.12 • The duties assisting a TCS shall include: • Assisting in TCS duties 5f, 5g, 5.h, 5.i, 6, 7, and 10 above. • Assisting in revising and implementing each required MHT, per the traffic control plan. • Performing as a spotter for the TCS. The flagger cannot perform any other TCS duties and cannot assist without a TCS present.

630.12Temporary Masking Signs. Sign legend or portions thereof that conflict with the

construction signing or Traffic Control Plan shall be completely covered by the Contractor so that none of the covered sign or legend is visible to traffic. If the whole sign is to be covered, it shall be covered with a nontransparent material that covers the entire face of the sign. If partial legend is to be covered, it shall be with a material furnished with reflective sheeting conforming to Section 713 and shall be the same color as the masked panel. All covering materials shall be plywood, hard-board, sheet metal, aluminum, corrugated polypropylene or rigid plastic, and shall be durable enough to resist deterioration due to weathering and atmospheric conditions for the duration of the project. Examples are aluminum at least 0.040 inch thick, corrugated polypropylene board, and plywood at least 3/8 inch thick. Adhesives, glues, tapes, or mechanical fasteners that mar the face of the panel to be masked shall not be used.

630.13General. Portable construction traffic signs shall be removed when not required

Permanently mounted construction traffic signs shall be masked or turned away from traffic when not required. When work is suspended, or the project is in free time, and there is no condition requiring traffic control devices or construction traffic signs, all of the construction traffic signs shall be masked or turned away from traffic. If this condition is to exist for more than 30 days, all construction traffic signs shall be removed. When storing portable signs or supports within the project they shall be removed beyond the clear zone and shall not be visible to traffic. The minimum clear zone distance shall be 18 feet, measured from the edge of traveled way. If the signs cannot be stored at least 18 feet from the traveled way, they shall be removed. Signs shall not be stored on the paved surface. All storage areas shall be approved. When masking is used, it shall be done per subsection

Perforated square metal tubing or U-channel shall be installed for temporary sign supports according to the manufacturer’s recommendations and as shown on the Plans. The Contractor shall be responsible for all maintenance of the signs and posts. If a sign or post is damaged during construction, the contractor shall be responsible for replacing and maintaining the sign and posts at no additional cost to the Project. The construction traffic signs for reduced speed limit signs and double fines signs shall be placed, or unmasked, no sooner than four hours before the start of work activities. The time when the double fine signing is to be placed or unmasked and location of the reduced speed limit signs and double fine signs shall be as shown on the plans or as directed by the Engineer. Double fine signing shall be removed or masked as soon as work activities are completed. Work activities are defined as all construction and maintenance activities where workers are present in the clear zone, or there are existing hazards in the travel way, shoulders, or clear zones. Hazards include but are not limited to workers, equipment, drop offs, lane closures,

630.14

temporary guardrail, and other objects, both in the roadway and the adjacent roadside, that may affect the traveling public. The retroreflective surfaces of all signs and other traffic control devices shall be cleaned as frequently as necessary to preserve their legibility and retroreflectivity. However, all devices shall be cleaned a minimum of once every two weeks.

Vertical panels fabricated with vehicle wheel rims, and steel drum channelizing devices shall not be used.

Channelizing Device (Fixed) shall be attached to the pavement per the manufacturer's recommendations. Anchoring methods or devices that penetrate the surface of the permanent pavement will not be permitted. Upon removal of the device, the roadway surface shall be cleaned, patched, or both as approved by the Engineer.

The flashing beacon shall be installed per subsection 614.09. For solar powered flashing beacons, batteries may be placed in a lockable container attached to a supplemental pole supporting the solar panels that is installed outside the clear zone, or behind guardrail. If it is not possible to place this assembly outside the clear zone or behind guardrail, the batteries shall be placed in a lockable pull box and buried at the base of the pole. Other installations shall be as approved.

The Contractor shall ensure the proper operation of the flashing beacon throughout the duration of the project. If the beacon fails to operate properly, it shall be repaired or replaced at the Contractor’s expense. The Contractor may propose an alternate method by submitting a revised MHT per subsection 630.10 for approval by the Engineer. All additional traffic control devices required during the time that the beacon is being repaired or the MHT is being prepared and reviewed shall be at the Contractor’s expense.

630.14Flagging and Pilot Car Operation. Flagging and pilot car operation shall be performed

as described in the latest edition of part VI of the MUTCD as adopted by CDOT.

All traffic control personnel shall wear all appropriate Personal Protective Equipment (PPE), including safety apparel and hardhats meeting the requirements of the latest version of the International Safety Equipment Association (ISEA)’s “American National Standard for High- Visibility Safety Apparel and Headwear”. Safety apparel shall be labeled as meeting the standard performance for Class 2 or Class 3 risk exposure. The apparel and hardhat background material color shall be either fluorescent orange-red or fluorescent yellow-green as defined in the standard. The retroreflective material shall be either orange, yellow, white, silver, yellow- green, or a fluorescent version of these colors, and shall be visible at a minimum distance of 1,000 feet.

Nighttime flagging stations shall be illuminated with flood lights unless otherwise approved and shall not be paid for separately.

safety to traffic. All flagging personnel shall have completed the Department's minimum training requirements as per the CDOT Flagger Program for flaggers before starting work on the project.

630.15

project limits or approach to the project; except if the project consists of two or more sections, the limits will apply to each section individually.

of flaggers are necessary to provide adequate warning for traffic and the protection of the work zone.

portion of the construction, irrespective of whether the detour termini are within the project limits.

limits of the project shall be at the Contractor's expense.

construction traffic that affects the traveling public within the project limits.

When Automated Flagger Assistance Devices (AFAD) are used, one of two methods are approved. Method 1 consists of an AFAD at each end of the Temporary Traffic Control (TTC) zone and method 2 consists of an AFAD at one end of the TTC zone and a flagger at the opposite end. A flagger may simultaneously operate two AFADs only if the Flagger has an unobstructed view of both the AFADs and the approaching traffic in both directions. AFADs shall only be operated by Flaggers who have received training and shall not leave the AFAD unattended at any time while in use.

630.15Emergency Pull-Off Area (Temporary). The specific locations where emergency

pull-off areas will be allowed shall be clearly detailed in the traffic control plans (TCP). The emergency pull-off areas shall be spaced one-half to one mile apart, unless otherwise shown on the TCP.

If the Engineer determines that law enforcement is required, the pull off area shall be extended as shown on the plans.

Temporary pavement material for the pull-off area shall be a minimum of 3 inches thick unless otherwise shown on the plans and may be either PCCP or HMA. If the materials used require that the Contractor provide thickness greater than the minimum to serve the life of the pull-off area, these shall be provided at no additional cost to the project.

Upon completion of the project, the Contractor shall remove the pull-off area and return the shoulder, signing, and earthwork to its original condition, unless otherwise shown on the plans. Materials removed and not designated in the Contract to be salvaged or incorporated into the work shall become property of the Contractor.

All damaged portions of the shoulder, earthwork, landscaping, signing, culverts, and end sections shall be repaired or replaced at the Contractor’s expense.

630.16Temporary Portable Rumble Strip. Temporary portable rumble strips shall be

placed in locations shown on the traffic control plans and shall be removed at the end of each workday, or as approved by the Engineer.

Before placement of the rumble strip, the roadway shall be cleaned to be free of dust, sand, and other materials that may cause slippage. The minimum roadway temperature at the time of installation shall be per the manufacturer’s recommendations.

If the strip slides, it shall be thoroughly cleaned on both sides and reset onto a clean roadway surface.

A minimum of two temporary portable rumble strips shall be arranged in an array, as shown on the plans. An additional temporary portable rumble strip may be added, as approved by the Engineer.

Damaged or missing rumble strips shall be replaced at the Contractor’s expense.

Temporary portable rumble strips shall be used only on roadways with posted speed limits of 75 MPH or less.

Rolling Roadblock.

roadblock operation plan (Pacing Plan). The Pacing Plan shall outline the Contractor’s expected equipment and personnel, law enforcement personnel, an outline of the operation, and include a contingency plan should any of the Contractor’s critical equipment break down. The Pacing Plan shall also include the times of the days of the week that Rolling Roadblock activities will be performed, and specific activities and locations for each aspect of the Rolling Roadblock. If there are certain work activities that need to be completed before start of the work anticipated during the rolling roadblock operation, the activities shall be clearly detailed in the Pacing Plan.

Rolling Roadblock operations shall not take place during holidays or special events, as described in the Traffic Control Plan – General, or as directed by the Engineer. A minimum of two weeks before start of rolling roadblock operations, the Contractor shall provide the date and times that rolling roadblock operations are to begin to the Engineer, the CDOT Region Traffic Engineer, the CDOT Public Information Office, and the Colorado State Patrol. Portable VMS signs shall be displayed one week before work with the messages shown on the plans.

distance required for the rolling roadblock operation, based on site-specific features, such as: roadway geometrics, pacing speeds, regulatory speeds, interchange spacing, work duration, availability of law enforcement officers, traffic volumes, and maximum queue length. On-ramps and entrances between the beginning point of the pacing area and the work area shall be blocked using flaggers and traffic control devices until the pilot vehicle has passed. Two-way radios shall be used to provide constant communication to pilot vehicles, contractor’s workers, flaggers stationed at on-ramps, and the Engineer. The starting point of a rolling roadblock operation shall consider the following factors: the speed of the pacing vehicles, the location of entrance ramps, and horizontal and vertical alignment of the facility. The minimum speed allowed for a rolling roadblock operation shall be 10 mph.

move all equipment not required for this operation to a safe distance away from the pertinent section of roadway. The TCS shall be present throughout the rolling roadblock operation. Two-way radios shall be provided for constant communication between the Engineer, the TCS, and law enforcement personnel.

630.17

Method of Measurement

630.17Quantities to be measured for construction traffic control devices shall be the

number of units of the various sizes and descriptions listed below.

Table 630-7 Sizing for Construction Traffic Signs Up to 9 Square Feet including Type 1 and Panel Size A Type 2 Barricades Panel Size B Over 9 to 16 Square Feet Panel Size C Over 16 Square Feet Special As shown on the plans

The total number of traffic control devices of each type on the schedule and approved subsequent modified schedules shall be the maximum number approved for payment. Traffic channelizing devices consisting of vertical panels, traffic cones, or drums will be measured by the unit. Traffic channelizing devices consisting of vertical panels, traffic cones, or drums will be measured by the unit. Barrier (Temporary) will be measured by the linear foot. Barricades will be measured by the number used. Barricade warning lights shall be furnished as a part of this item when required by the Traffic Control Plan (TCP). Advance Warning Flashing or Sequencing Arrow Panels will be measured by the unit according to size.

Temporary Portable Rumble Strips will be measured by the actual number of strips that are used on the project.

The Flashing Beacon (Portable) will be measured as a unit complete in place. Each sign panel will be paid for under the appropriate item. The solar power system for Flashing Beacon (Portable), poles, and lockable container will not be measured and paid for separately but shall be included in the work. The quantity to be measured for Traffic Control Management will be the number of authorized 24-hour days of active TCM performed by the TCS/TCS Trainee (Flagger) pair or another representative certified as a work site traffic control supervisor. Payment will be made for one day of Traffic Control Management regardless of the number of TCSs required to adequately control the work. An authorized 24-hour day of TCM is each calendar day active traffic control occurs per an approved MHT. This includes activities such as flagging operations, pilot car operations, and setting up or removal of construction zones, shoulder closures, lane closures or detours. Traffic control devices that are left in place during non-working hours, including configurations such as lane closures, temporary channelization or detours, are not considered active traffic control. The quantity to be measured for Traffic Control Inspection will be the number of authorized 24-hour days of traffic control inspection (TCI) performed by the TCS/TCS Trainee (Flagger) pair or another representative certified as a worksite traffic control supervisor. An authorized 24- hour day of TCI is each calendar day that traffic control devices, as shown in the MHT are in use, masked, or turned away from traffic on the project, and the only traffic control activity is the inspection of traffic control devices.

630.17

Cleaning and maintaining of traffic control devices are not considered traffic control activities subsidiary to the TCM, TCI, or flagging pay items. Cleaning and maintaining devices are included in the Basis of Payment section.

Payment will be made for either Traffic Control Management or Traffic Control Inspection for each calendar day as defined above in 630.18. Payment will not be made for both pay items for the same calendar day.

Work on a night shift that begins before midnight and ends after midnight will be measured by the calendar day that the shift ends.

The quantity to be measured for flagging will be the total number of actual flagging hours that are used as authorized per an approved MHT. Payment will not be made for time spent by flaggers to set up and take down construction traffic control devices. Payment will not be made for additional flaggers necessary to cover flagger break times and shall be included in the cost of the work.

The quantity to be measured for pilot car operation will be the total number of hours that pilot car operation is used as authorized. Hours of flagging and hours of pilot car operation in excess of those authorized shall be at the Contractor’s expense.

Emergency Pull-Off Area (Temporary) will be measured by the actual number of pull-off areas that are constructed, maintained, and removed. When the Contract provides payment for Mobile Pavement Marking Zone on a lump sum basis, it will not be measured but will be paid for as a single lump sum upon satisfactory completion of the work associated with this item. When the Contract provides payment for Mobile Pavement Marking Zone by the day, it will be measured as the actual number of days that Mobile Pavement Marking Zone is utilized in the project. AFADs will be measured per device. While an AFAD is in operation, the operating flagger shall not perform other flagging duties except as outlined in Method 2 as defined in Subsection 630.14 and MUTCD Chapter 6. The operator flagger for the AFAD is not paid for separately but included in the cost of the work.

Rolling Roadblock Operation will be measured as the actual number of hours that this operation is used. If measured by the day, Rolling Roadblock Operation will be measured as the actual number of days, or part of, that this operation is used.

Temporary VMS signing will be measured and paid for per Section 630.02.

Emergency Pull-Off Area (Temporary) will be measured by the actual number of pull-off areas that are constructed, maintained, and removed. When the Contract provides payment for Mobile Pavement Marking Zone on a lump sum basis, it will not be measured but will be paid for as a single lump sum upon satisfactory completion of the work associated with this item. When the Contract provides payment for Mobile Pavement Marking Zone by the day, it will be measured as the actual number of days that Mobile Pavement Marking Zone is utilized in this project.

630.18 AFADs will be measured per device. While an AFAD is in operation, the operating Flagger shall not perform other flagging duties except as outlined in Method 1 as defined in Subsection 630.14 and MUTCD Chapter 6.

Rolling Roadblock Operation will be measured as the actual number of hours that this operation is used. If measured by the day, Rolling Roadblock Operation will be measured as the actual number of days, or part of, that this operation is used. Temporary VMS signing will be measured and paid for per Section 630.

Basis of Payment

630.18Payment for the individual traffic control devices necessary to complete the work

shall be full compensation for furnishing, erecting, cleaning, maintaining, resetting, repairing, replacing, moving, removing, and disposing of the construction traffic control devices. All construction traffic control devices that are not permanently incorporated into the project will remain the property of the Contractor. Construction traffic control devices, as determined by the project Traffic Control Plan (TCP), will be paid for as follows: 50 percent of the accepted amount upon first utilization, an additional 40 percent of the accepted amount when 75 percent of the original contract amount has been earned, and the final 10 percent when the project has been completed per subsection 105.21, exclusive of any maintenance periods. The percent of original contract amount earned will be determined by comparing the amount earned for bid items, other than traffic control devices and mobilization, with the original contract amount minus the amounts bid for traffic control devices and mobilization.

The accepted quantities will be paid for at the contract unit price for each of the pay items listed below that appear in the bid schedule.

630.18

Payment will be made under:

Pay Item Pay Unit Construction Traffic Sign (Panel Size ) Each Construction Traffic Sign (Special) Square Foot Vertical Panel Each Vertical Panel (With Light) (Flashing) Each Vertical Panel (With Light) (Steady Burn) Each Advance Warning Flashing or Sequencing Arrow Panel (____Type) Each Drum Channelizing Device Each Traffic Cone Each Tubular Marker Each Channelizing Device (Fixed) Each Barrier (Temporary) Linear Foot Delineator (Type ) (Temporary) Each Barricade (Type ) (Temporary) Each Traffic Control Management Day Traffic Control Inspection Day Flagging Hour Pilot Car Operation Hour Flashing Beacon (Portable) Each Traffic Signal (Temporary) Lump Sum Mobile Pavement Marking Zone Lump Sum Emergency Pull Off Area (Temporary) Each Mobile Pavement Marking Zone Day Stackable Vertical Panel Each Stackable Tubular Marker Each Temporary Portable Rumble Strips Each Automated Flagging Assistance Device Each Automated Flagging Assistance Device Day Rolling Roadblock Day Rolling Roadblock Hour

Construction Traffic Sign (Special) is a project specific sign indicated on the Schedule of Construction Traffic Control Devices. When Traffic Control Management and Traffic Control Inspection are not pay items, Traffic Control Management will not be paid for separately, but shall be included in the work.

Flagger hand devices will not be measured and paid for separately but shall be included in the work.

Cost of electrical power, including batteries, for all temporary lighting or warning devices shown on the TCP will not be paid for separately but will be considered subsidiary to the item.

Temporary masking signs, including the covering materials and fastening devices, will not be measured and paid for separately but shall be included in the work.

630.18

The Contractor may provide larger construction traffic signs than those shown on the plans, if approved; however, payment will be made for the panel size designated. If the Contractor fails to complete construction within the approved contract time, Payment will not be made for the use of Section 630 pay items for the period of time after expiration of the approved contract time. These items shall be provided at the Contractor’s expense. Cleaning and patching of the roadway after removal of the Channelizing Device (Fixed) will not be paid for separately but shall be included in the work. Placement, unmasking, removal and masking of reduced speed limit signs and double fines signs, will not be measured and paid for separately but shall be included in the work. Preparation and implementation of the Traffic Management Plan will not be measured and paid for separately, but shall be included in the work, except for public information services that will be measured and paid for per Section 626 as revised for this project.

Traffic Control Management, vehicles, traffic control devices, and all other work, materials and equipment necessary for the mobile pavement marking zone will not be measured and paid for separately but shall be included in the work.

Flagging required for the mobile pavement marking zone will be measured and paid for separately.

Payment for Emergency Pull-off Area (Temporary) will be full compensation for all work, materials, and equipment necessary to construct, maintain and remove the emergency pull-off area including: HMA or PCCP required for constructing the temporary pull-off area; temporary concrete barriers, impact attenuators and other traffic control devices; construction signing; and maintaining the temporary pavement.

Payment for Temporary Portable Rumble Strips will be full compensation for all work and material required to complete the item including: cleaning the roadway surface, installing the rumble strip, maintaining the strip through the duration of each day’s use (including cleaning and resetting of the strip if it slides), removal at the end of each workday, and final removal. Signing required for the rumble strip will be measured and paid for under the construction signing items.

Construction signing will be measured and paid for under the appropriate construction signing items. Portable Variable Message Signs (VMS) will be measured and paid for per the project special provision, Revision of Section 630, Portable Message Sign Panel. Traffic control officers and vehicles will be paid for per the project special provision, Revision of Section 630, Uniformed Traffic Control. Flaggers will be paid for under Pay Item 630, Flagging. Two-way radios will not be measured and paid for separately but shall be included in the work. Temporary concrete barrier walls, if required, will not be measured and paid for separately but shall be included in the work.

641.01