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Work Zone Safety Information Clearinghouse

Library of Resources to Improve Roadway Work Zone Safety for All Roadway Users

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Maintenance Equipment

Feasibility of Advanced Vehicle Control Systems (AVCS) for Highway Maintenance Vehicles

Advanced vehicle control systems (AVCS) encompass a wide range of technologies that aid a driver in the driving task by automatically performing control actions (braking, accelerating, or steering) or … [Read more...] about Feasibility of Advanced Vehicle Control Systems (AVCS) for Highway Maintenance Vehicles

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Illinois requires that work zone lane closures be set up in the direction of traffic flow. Vehicles used in this process may work out of the closed lane. Work zone take-down is done in the reverse … [Read more...] about Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Michigan does not require the work vehicle to have a TMA. It does not require truck-mounted attenuators (TMAs) or a shadow vehicle to be used when setting up a lane closure. In its TMA guidelines, … [Read more...] about Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Virginia requires the use of a shadow vehicle when installing and removing lane closure traffic control. When the posted speed limit is 45 mph or greater on roadways with four or more travel lanes, … [Read more...] about Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Minnesota DOT does not require the use of truck-mounted attenuator (TMA) equipped vehicles for the installation of temporary traffic control devices. However, Mn/DOT sometimes uses mobile lane … [Read more...] about Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

Caltran's policy for maintenance operations is as follows: When closing a lane, a barrier vehicle or a shadow vehicle shall be used for the installation of the signs and the FAS if they can be placed … [Read more...] about Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA)

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Copyright © 2026 American Road & Transportation Builders Association (ARTBA). The National Work Zone Safety Information Clearinghouse is a project of the ARTBA Transportation Development Foundation. It is operated in cooperation with the U.S. Federal Highway Administration and Texas A&M Transportation Institute. | Copyright Statement · Privacy Policy · Disclaimer
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