![]() ![]() Lead/Clearing vehicle - After the traffic has been blocked, this vehicle travels through the pacing distance to verify that all traffic has cleared.In addition, if a queue forms beyond the advance warning vehicle’s location, the officer can back down the shoulder warning and slowing traffic to help prevent rear end collisions. The purpose of this vehicle is to alert traffic to the slowed traffic ahead. Advance warning vehicle (optional) - If used, this vehicle would be a law enforcement vehicle and would remain on the shoulder of the road with flashing lights on at the location where the blocking/pacing begins.In at least one State, a single law enforcement vehicle has also been used for this function by driving in a back and forth weaving motion across all lanes of traffic to block traffic. A minimum speed of 10 mph with speeds of 20-30 mph is the preferred speed for the pacing operation. These may be law enforcement or work vehicles equipped with flashing lights and/or changeable message signs. Blocking/pacing vehicles - These vehicles travel side by side, one in each lane, to keep traffic blocked behind them as they move down the road.The following describes the functions of the vehicles used to control a rolling roadblock. 2Ī rolling roadblock requires one blocking/pacing vehicle per lane of traffic, a clearing vehicle, and an advance warning vehicle. ![]() The Maryland State Highway Administration’s Policy for use of rolling roadblocks also cites use based on the need to slow traffic due to abrupt lane shifts or hazardous conditions requiring reduced speed. Removing the traffic from the work area removes the risk for the motorist if some unexpected mishap should occur, such as a bridge beam being dropped. These activities could be an inherent danger to the motoring public in that they are performed on or above the roadway where traffic is present. Separation of Traffic and Construction in Canada Averted Safety Issues from a Bridge Beam Collapse 1 Pulling wires or cables across the roadway.Activities that may warrant the use of a rolling roadblock include, but are not limited to: Rolling roadblocks are used for short term work where long term road closures using temporary traffic control devices (TTCD) are not needed. The rolling roadblock closes all lanes of traffic by using pacing vehicles to create a gap so that construction activities can be performed. West Virginia DOT Special Provision for Rolling RoadblocksĪ rolling roadblock is a method of temporary traffic control that is used to slow or stop traffic as a means of temporarily removing traffic from a roadway. Colorado DOT Specifications for Rolling Roadblocks Communicating with the Public and Other.Temporary Traffic Control (TTC) Details. ![]()
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