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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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Highway Capacity

Traffic Flow at a Freeway Work Zone with Reversible Median Lane

Work zones on freeways usually affect the quality of service for road users. Aiming to reduce traffic flow disruptions to a minimum, Hessen Mobil — Road and Traffic Management installed an innovative … [Read more...] about Traffic Flow at a Freeway Work Zone with Reversible Median Lane

Development of a Guideline for Work Zone Diversion Rate and Capacity Reduction

This study develops a comprehensive guideline to estimate the traffic diversion rates and capacity reduction for work zones. The analysis of the traffic diversion patterns with data from past work … [Read more...] about Development of a Guideline for Work Zone Diversion Rate and Capacity Reduction

Innovative Work Zone Capacity Models from Nationwide Field and Archival Sources

Freeway work zone capacity has been the focus of significant research, but most studies were limited to specific geographic regions or work zone configurations or both. To date, no work zone … [Read more...] about Innovative Work Zone Capacity Models from Nationwide Field and Archival Sources

Incident Capacity Reduction on Four-lane Freeways Using Real World Data: Multilane Closures

One of the main goals in incident management is to reduce delay and queuing caused by an incident. Delay and queuing are among other things dependent on the road capacity, so an accurate estimate of … [Read more...] about Incident Capacity Reduction on Four-lane Freeways Using Real World Data: Multilane Closures

Work-Zone Traffic Operation and Capacity

In assessments of the impact of expressway lane closures on traffic flow, current practice generally involves an assumption of the nominal capacity per lane which varies, in some cases significantly, … [Read more...] about Work-Zone Traffic Operation and Capacity

Effects of Road Construction Intensity and Operations on Rural Freeway Work Zone Capacity

Capacity is affected by construction type and its intensity on adjacent open traffic lanes. The effect on capacity is a function of vehicles moving in and out of the closed lanes of the work zone, and … [Read more...] about Effects of Road Construction Intensity and Operations on Rural Freeway Work Zone Capacity

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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