National Work Zone Safety Information Clearinghouse

Library of Resources to Improve Roadway Work Zone Safety for All Roadway Users

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Signs

Contractor identification sign in work zones (Practice)

Washington DOT allows the use of contractor identification signs on projects and has developed criteria for their use. There are two signs that are used and the criteria can be viewed at the following… More

Evaluation of Early Merge Static Work Zone Signing in Oklahoma (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
This research examined the safety and operational benefits of having traffic merge early into the open lane prior to a work zone merge area. A 2007 law in Oklahoma adopted the use of additional “STA…More

Guidelines for Traffic Control in Work Zones – Pocket Guide (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
This pocket guide summarizes some guidelines established in the Ohio Manual of Uniform Traffic Control Devices (OMUTCD). It contains basic principles, a description of the standard traffic control dev…More

Contractor identification sign in work zones (Practice)

Texas DOT requires this type of signing on all construction projects and maintenance projects that are let by TxDOT, except on projects where this is not practical such as a districtwide contract for … More

Signing for the end of work zone (Practice)

Illinois uses "END CONSTRUCTION" signs at the ends of work zones. If the location is also the end of a special work zone speed limit, then the "END CONSTRUCTION" sign is replaced with an "END WORK ZON… More

Contractor identification sign in work zones (Practice)

Nevada DOT has used signs in the past that indicated the contractor and other entities with input to the project. Original sign designs listed contractor name, DOT, and other entities (FHWA, city, cou… More

Signing for the end of work zone (Practice)

Georgia uses the "End Road Work" sign at the end of the work zone. If the speed limit has been reduced, then a speed limit sign is posted approximately 500 feet past the work zone to raise the speed l… More

New Law Gets Rid of Construction Signs (Publication)

Resource Type: News and Other Non-research Articles
Louisiana governor has signed into law a bill (House Bill 764) to do away with the signs that describe the cost and scheduled completion date of highway construction. The change is a cost-cutting move…More

Flashing lights on speed limit signs (Practice)

Illinois DOT uses flashing lights on speed limit signs. This is part of special provisions with penalties to contractors that fail to use. (However, penalties have not been enforced.) Speed limit is 4… More

Road Sign Vision and Driver Behaviour in Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
The effectiveness of roadwork signs on drivers’ safety is a poorly investigated topic. The present study examined visual fixations of 29 participants to work zone signs, while driving 27 km along …More

More Business Signs OK’d in Road Construction Zones (Publication)

Resource Type: News and Other Non-research Articles
In recognition that businesses in construction zones are suffering, the Yuma city of Arizona has adopted a policy allowing them to place additional temporary signage to attract customers. This is an e…More

Teenage Drivers’ Understanding of Traffic Control Devices (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Teenage drivers are involved in traffic crashes more often than any other driver group, and their fundamental knowledge of traffic control devices and rules of the road is extremely important in safe …More

Handbook of Recommended Information Sign Symbols for Canada (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
TAC’s Handbook was developed to encourage uniformity in symbol usage throughout Canada. The document meets the needs of many Canadian jurisdictions in that it serves as a reference guide on informat…More

Crash Tests of Work Zone Traffic Control Devices (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Full-scale vehicle crash tests were used to evaluate performance of typical work zone traffic control devices. Modified test procedures and evaluation criteria from National Cooperative Highway Resear…More

Improving Regulatory Speed Limit Management in Texas Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
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 i…More