United States Department of Transportation
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Abstract:In 2002, 21 percent of crashes and 24 percent of all fatalities and injury collisions occurred at signalized intersections. Because traffic signals play an important role in improving safety at intersections, the Federal Highway Administration (FHWA) has produced a comprehensive guide titled Signalized Intersections: Informational Guide, which provides methods for evaluating the safety and operations of signalized intersections and tools to remedy deficiencies. The information contained in this guide is based on the latest research available. The guide's information and tools will help practitioners make insightful intersection assessments and understand the tradeoffs of potential improvement measures. Additional resources and references are highlighted for those who wish to learn more about a particular subject. The guide includes examples of novel treatments and best practices in use by jurisdictions across the United States. These treatments include low-cost measures such as improvements to signal timing and signs, and high-cost measures such as intersection reconstruction or grade separation. Although some treatments apply only to high-volume intersections, information in the guide applies to signalized intersections of all volume levels. This publication is not intended to replicate or replace traditional traffic engineering documents such as the Manual on Uniform Traffic Control Devices, the Highway Capacity Manual, and the American Association of State Highway and Transportation Officials' A Policy on Geometric Design of Highways and Streets, nor is the guide intended to serve as a standard or policy document.
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Content Notes:The original format of this document was an active HTML page(s). The Federal Highway Administration converted the HTML page(s) into an Adobe Acrobat PDF file to preserve and support reuse of the information it contained. The intellectual content of this PDF is an authentic capture of the original HTML file. Hyperlinks and other functions of the HTML webpage may have been lost, and this version of the content may not fully work with screen reading software.
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