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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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Variable Speed Limit Systems

Evaluation of a Motorist Awareness System

The objective of this study was to determine the effects of a Motorist Awareness System (MAS) on vehicle speeds in highway work zones. Spot speed studies were conducted prior to, within, and near the … [Read more...] about Evaluation of a Motorist Awareness System

Minnesota IWZ Toolbox: Guideline for Intelligent Work Zone System Selection

The IWZ Toolbox has been prepared as a guideline for selecting an appropriate Intelligent Work Zone (IWZ) System for existing work zone traffic issues and to mitigate anticipated issues on scheduled … [Read more...] about Minnesota IWZ Toolbox: Guideline for Intelligent Work Zone System Selection

Variable Speed Limit Sign: Effects on Speed and Speed Variation in Work Zones

Variable Speed Limit (VSL) signs are used across the country in conjunction with Intelligent Transportation Systems to lower posted speed limits in areas affected by conditions such as congestion, … [Read more...] about Variable Speed Limit Sign: Effects on Speed and Speed Variation in Work Zones

Improving Regulatory Speed Limit Management in Texas Work Zones

This project summary report summarizes the research performed in Texas Department of Transportation (TxDOT) Project 0-5561. TxDOT's procedure for determining whether a reduced regulatory speed limit … [Read more...] about Improving Regulatory Speed Limit Management in Texas Work Zones

Synthesis of Traffic Calming Techniques in Work Zones

Nationwide, over 1,000 fatalities and 40,000 injuries occur annually in work zones, which include both construction zones and areas where maintenance is performed. The majority (85%) of work zone … [Read more...] about Synthesis of Traffic Calming Techniques in Work Zones

Studies to Improve the Management of Regulatory Speed Limits in Texas Work Zones

This report describes the methodology and results of analyses performed to (1) improve existing procedures on establishing and managing work zone speed limits, and (2) evaluate new technologies and … [Read more...] about Studies to Improve the Management of Regulatory Speed Limits in Texas Work Zones

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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