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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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Iowa

Work zone speed limit

See the Construction Manual Section, 5.42 TEMPORARY WORK ZONE SPEED LIMITS on the web site below. … [Read more...] about Work zone speed limit

Use of flashing stop/slow paddle

Iowa has improved highway work zone safety by outfitting its work crews with flashing stop/slow paddles. Iowa DOT purchased 75 flashing stop/slow paddles and distributed them to flaggers throughout … [Read more...] about Use of flashing stop/slow paddle

Work zone implementation of intelligent transportation systems

Iowa implemented a pilot project of "smart work zone" on IH-80, using highway advisory radio, detector unit, and 2 solar-powered video cameras on each detector unit. Project sent real-time images … [Read more...] about Work zone implementation of intelligent transportation systems

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

Use of alternate routes is encouraged in Iowa. … [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 accidents in work zones

Iowa places advance signs indicating possible delays so motorists can take alternate routes. For lane closures, IDOT has placed advance signs encouraging lane changes before the last opportunity to … [Read more...] about Traffic management techniques (beyond the MUTCD) used to reduce accidents in work zones

Protection for bridge ends or other fixed objects in two-lane two-way operations

Iowa DOT protects the off-end of bridges in its two-lane two-way operations work zones by temporarily placing the appropriate metal beam guardrail treatments. If a metal beam rail does not work, crews … [Read more...] about Protection for bridge ends or other fixed objects in two-lane two-way operations

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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
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