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原文传递 Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads. Final Report.

题名：	Safety Impacts and Other Implications of Raised Speed Limits on High-Speed Roads. Final Report.
作者：	kockelman, k.
关键词：	statistical analyses, crash rates, injuries
摘要：	This report describes the analyses performed and results obtained by a study of safety and other impacts of speed limit changes on high-speed roads. Safety-related analyses were based on a comprehensive framework of the disaggregate relationships between speed limits, driver speed choices, crash occurrence and crash severity. Using a variety of datasets, the project conducted numerous statistical analyses to elucidate and quantify these relationships. The project identified a relatively small but statistically significant correspondence between speed limits and total crash rates: a speed limit increase from 55 to 65 mi/h on an average high-speed road section would be associated with a crash rate increase of around 3%. Finally, the project found a statistically significant association between speed limits and the distribution of injury severities following a crash. / Supplementary Notes: See also PB2007-106708. Sponsored by American Association of State Highway and Transportation Officials, Washington, DC. and Federal Highway Administration, Washington, DC. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0711；197p
报告类型：	科技报告