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原文传递 Crash reductions following installation of roundabouts in the United States.

题名：	Crash reductions following installation of roundabouts in the United States.
作者：	PERSAUD-B (Ryerson Polytechnic University, USA); RETTING-R (Insurance Institute for Highway Safety, USA); GARDER-P (University of Maine, USA); LORD-D (Ryerson Polytechnic University, USA)
关键词：	CONFERENCE-; 8525-; ROUNDABOUT-; 0438-; ACCIDENT-RATE; 1612-; BEFORE-AND-AFTER-STUDY; 0170-; STATISTICS-; 6555-; ANALYSIS-MATH; 6471-; REGRESSION-ANALYSIS; 6588-; MEAN-MATH; 6549-; INJURY-; 2163-
摘要：	Modern roundabouts are designed to control traffic flow at intersections without the use of stop signs or traffic signals. U.S. experience with modern roundabouts is rather limited to date, but in recent years there has been growing interest in their potential benefits and a relatively large increase in roundabout construction. The present study evaluated changes in motor vehicle crashes following conversion of 24 intersections from stop sign and traffic signal control to modern roundabouts. The settings, located in 8 states, were a mix of urban, suburban, and rural environments. A before-after study was conducted using the empirical Bayes approach, which accounts for regression to the mean. Overall, the empirical Bayes procedure estimated highly significant reductions of 38 percent for all crash severity's combined and 76 percent for all injury crashes. Reductions in the numbers of fatal and incapacitating injury crashes were estimated to be about 90 percent. Overall, results are consistent with numerous international studies and suggest that roundabout installation should be strongly promoted as an effective safety treatment for intersections in the U.S. For the covering abstract and the URL of the conference see ITRD E205706. (Author/publisher).
总页数：	PROCEEDINGS OF THE CONFERENCE ROAD SAFETY ON THREE CONTINENTS IN PRETORIA, SOUTH AFRICA, 20-22 SEPTEMBER 2000 (VTI KONFERENS 15A). 2001. (15A) pp540-552 (18 Refs.)
报告类型：	科技报告