An official website of the United States government.
Here's how you know
The .gov means it's official.
Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser's address (or "location") bar.
This site is also protected by an SSL (Secure Sockets Layer) certificate that's been signed by the U.S. government. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely.
Michael Turnbell, Sun Sentinel The latest way to stop speeders in South Florida? Trick them with an optical illusion. The “magic” involves marking a road with hash marks, similar to those on a football field. With the lines spaced at gradually closer intervals, drivers get the illusion they’re going faster than they really are — […]
Lydia Seabol Avant, Tuscaloosa News TUSCALOOSA | The Tuscaloosa County Commission could soon adopt a policy to regulate where speed tables can be placed. There is no policy or process regulating speed tables in unincorporated areas of Tuscaloosa County. Currently, county commissioners propose placing the tables based on requests from their constituents. The requests then […]
Report Number: FHWA/VCTIR 12-R8 To incorporate safety into the regional planning process, a Virginia-specific resource guide was recently developed for use by districts of the Virginia Department of Transportation (VDOT) and planning district commissions (PDCs). In order to determine how to enhance the implementation of the guide throughout Virginia, a pilot implementation of the guide […]
The project entitled “A National Model for the Evaluation of CMV Selective Enforcement Programs” had the goal of describing best practices for the evaluation of Ticketing Aggressive Cars and Trucks (TACT) projects. The methodology and examples are typically not restricted to formal TACT projects, and they generally apply to any project involving selective enforcement and […]
This manual describes a comprehensive approach to traffic safety analysis, from collecting potentially useful information to ranking tentative solutions. Individual chapters can also be consulted and applied independently, such as to check a location’s crash ranking (Chapter 3), alternative crash countermeasures (Chapter 4) or the relative safety benefits and costs of a specific countermeasure (Chapter […]
This article describes the CORRECT (Cost/Benefit Optimization for the Reduction of Roadway Environment Caused Tragedies) system which has been used by the Alabama Highway Department Accident Identification and Surveillance Section for over 15 years. In 1988, the system was enhanced by replacing the dynamic programming algorithm of optimization by a branch-and-bound algorithm which is easier […]