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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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Temporary Concrete Barriers

Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

West Virginia uses "B-1" delineators every 20' mounted along the face (about 3/4 up). They can mount on top as an alternate, and various sizes are permitted. All delineators are attached by PVC … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Wisconsin has typically not used top-mounted object markers on portable concrete barrier. The normal practice is to use only side-mounted delineator reflectors at 20-foot spacing. On curved alignment … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Alabama requires a small, flexible plastic substrate marker mounted on the top of concrete barrier in construction work zones. These plastic markers are covered with silver Type III reflective … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Washington state has no requirement to put reflectors on permanent barrier. The state does, however, require them on any temp barrier 6" down on the face. A variety of manufactureres are approved. … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Montana uses a top-mounted delineator that is 108mm wide by 89mm tall, using the recommended manufacturer specifications for an adhesive to fasten these to the top of the rail every 9.15 meters. … [Read more...] about Top-mounted object markers for delineation of portable concrete barrier wall on highway projects or alternative devices

Lighted Guidance Tube Evaluation

This report summarizes the evaluation of the Lighted Guidance Tube (LGT), a 3M product used to delineate a temporary detour curve section on the Eddyville-Cline Hill Section construction project. The … [Read more...] about Lighted Guidance Tube Evaluation

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Copyright © 2025 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
American Road and Transportation Builders Association Transportation Development Foundation, American Road and Transportation Builders Association U.S. Department of Transportation Federal Highway Administration Texas A&M Transportation Institute