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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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Merging Control

Minimizing User Delay and Crash Potential Through Highway Work Zone Planning

Lane closures due to highway work zones introduce many challenges to ensuring smooth traffic operations and a safe environment for drivers and workers. In addition, merging has been found to be one of … [Read more...] about Minimizing User Delay and Crash Potential Through Highway Work Zone Planning

Study on Merging Sign Installation in Work Zone of Expressway based on Changeable Critical Headway

The purpose of this research was to consider the vehicles’ changeable critical headway when driving along the upper work zone, and reducing conflicts and risks by merging in the end of the warning … [Read more...] about Study on Merging Sign Installation in Work Zone of Expressway based on Changeable Critical Headway

Research on Dynamic Merge Control at Freeway Expanding Reconstruction Section

In order to improve the safety and efficiency of the freeway expanding construction work zone, aiming at the merging traffic before the section, by studying the existing measures to control the … [Read more...] about Research on Dynamic Merge Control at Freeway Expanding Reconstruction Section

‘Zipper Merge’ Proposed for Saskatoon Work Zones

Saskatoon is introducing zipper merging, a new method of traffic control, to mitigate traffic congestion in its work zones. Zipper merging requires motorists to use two lanes as they near a merging … [Read more...] about ‘Zipper Merge’ Proposed for Saskatoon Work Zones

Two Simplified Intelligent Transportation System-Based Lane Management Strategies for Short-Term Work Zones

Intelligent transportation systems-based lane management technologies were introduced to work zones in an attempt to reduce congestion and diminish queue lengths. Two forms of lane merging–the early … [Read more...] about Two Simplified Intelligent Transportation System-Based Lane Management Strategies for Short-Term Work Zones

Don’t Feel Cheated: ‘Late Mergers’ in Construction Zones can Actually Ease Traffic Congestion

Most drivers believe they are abiding by proper roadway etiquette when they merge as soon as possible after being notified of a lane closure. Because most drivers merge early, an open lane is created … [Read more...] about Don’t Feel Cheated: ‘Late Mergers’ in Construction Zones can Actually Ease Traffic Congestion

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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