General Notes - Section F
Trafic Control Setup and Removal
F-1. Temporary traffic control zones are to be set up by utilizing the following:
- PATA Drawing without modifications.
- MUTCD Typical Application without modifications.
- PATA Drawing with approved modifications.
- MUTCD Typical Application with approved modifications.
- Customized Temporary Traffic Control plans created specifically and approved for the work area.
Furthermore, the PATA drawings shall be utilized in lieu of a MUTCD Typical Application when roadwayconditions are similar (For example, PATA 306 and PATA 603 would have precedence over MUTCD TA-35 for a mobile operation on a multi-lanehighway).
F-2. Guidelines for installation and removal of traffic control setups:
- Utilize PATA 007A when setting up and removing temporary traffic control signs and devices on afreeway or expressway when there will be no roadway encroachment.
- Utilize PATA 007B when setting up and removing temporary traffic control signs and devices on afreeway or expressway when a vehicle will occupy a travel lane.
- Install signs beginning with the first sign motorists will pass when entering the advance warningarea and continue placing signs downstream on the same side of the roadway until complete. Cover, remove, or modify existing signs with conflicting messages in conjunction with temporary sign placement. Refer to Publication 408, Section 901.3(a), for details on covering signs.
- Flaggers may begin controlling traffic after placement of all advance warning signs.
- Channelizing devices shall be installed in the direction of travel. A shadow vehicle may be placed between approaching traffic and the workers who are installing channelizing devices.After channelizing devices are installed, the vehicle may moved and work may begin.
- Immediately upon completion of work, remove traffic control devices in the reverse in which they were installed. Applicable traffic control zone components should be addressed in the following order: 1) Termination Area 2) Activity Area 3) Transition Area 4) Any Flagger Stations 5) Advance Warning Area.
F-3. Shadow Vehicle and Impact Attenuator information can be found in Publication 46, Section 6.11. In conjunction with any temporary traffic control zone, shadow vehicles:
- Are mandatory with a Truck Mounted Attenuator for work on expressways, freeways, and ramps.
- Are optional for work on all other highways (unless labeled as mandatory on the PATA).
- Shall be equipped with flashing, oscillating, or revolving yellow lights. These are to be active on all shadow vehicles and must be visible from any direction (360° visibility). Hazard warning lights andturn signals are not considered flashing lights for this purpose.
- Shall not be involved in the operation as a work vehicle.
- Shall not be located within the buffer space.
- Shall be used in pairs (separated by a minimum distance of A) for bridge inspection teams while working on freeways or expressways (unless otherwise approved by the District Traffic Engineer).
- May be mobile if they are kept between 125' and 200' from workers or nearest work vehicle in a continuously moving operation. This distance may be increased to 1000' for paving operations.
- May be used in emergency situations to protect concrete barrier blunt ends. District Traffic Engineer approval is required if shadow vehicle will be in place longer than three days.
F-4. An optional three cone advance setup may be used to alert oncoming traffic to a flagger location. If used, the cone located nearest to the flagger should be placed on the roadway centerline directly across from the Flagger Symbol (W20-7) sign. Place two additional cones upstream equally spaced at a distance of 10' to 50'. If additional cones are desired, one may be placed on the roadway centerline directly across from advance warning signs. Refer to PATA 002 for further guidance.
F-5. Consider using temporary longitudinal barrier to protect workers in all multi-lane work zones if the speed limit is 45 MPH or greater, workers are present within one lane width of an active lane, and a lane or shoulder is closed continuously for more than three days. Refer to Publication 72M, Roadway Construction Standards, for barrier installation details.
F-6. Paved shoulders may be used for traffic if they are structurally sound, have sufficient width and depth to safely support traffic, and are free of debris. Shoulders that will be used for traffic in conjunction with long-term operations may require extra attention, such as:
- Mill and fill existing edge line and shoulder rumble strips.
- Eradicate and paint new white edge lines.
- Review the condition and elevation of inlet grates. Tack-weld grate inlets to frames.
- Refer to Publication 13M, Design Manual Part 2, for cross slope information.