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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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Traffic Signals

The SQ2 System

… [Read more...] about The SQ2 System

Portable Traffic Signals

… [Read more...] about Portable Traffic Signals

An Evaluation of Portable Traffic Signals at Work Zones

Portable traffic signal systems are now being marketed by several manufacturers. These systems have the potential for replacing flaggers in many work zones that require alternating one-way traffic … [Read more...] about An Evaluation of Portable Traffic Signals at Work Zones

Feasibility of Portable Traffic Signals to Replace Flaggers in Maintenance Operations

The purpose of the research project was to explore the use of portable traffic signal technology as a means for improving the efficiency of two-lane rural maintenance operations. The research findings … [Read more...] about Feasibility of Portable Traffic Signals to Replace Flaggers in Maintenance Operations

Traffic management techniques (beyond the MUTCD) used to reduce delay in work zones

In Texas, portable trailer-mounted closed circuit television (CCTV), portable changeable message signs (CMS), portable highway advisory radio (HAR), and portable traffic signals are used to reduce … [Read more...] about Traffic management techniques (beyond the MUTCD) used to reduce delay in work zones

Traffic management techniques (beyond the MUTCD) used to reduce delay in work zones

Puerto Rico has used different techniques. a) In urban areas traffic signals have been reprogrammed using historic and actual data on the area of the project. b) In some cases reversible lanes are … [Read more...] about Traffic management techniques (beyond the MUTCD) used to reduce delay in work zones

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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
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