详情

原文传递 Relationship between Side Slope Conditions and Collision Records in Washington State; Final research rept

题名：	Relationship between Side Slope Conditions and Collision Records in Washington State; Final research rept
作者：	Allaire, C.; Ahner, D.; Abarca, M.; Adgar, P.; Long, S.
关键词：	Collision avoidance; Traffic safety; Highway transportation; Slopes; Cost benefit analysis; Washington State; Statistical analysis
摘要：	Design guidelines for road side slopes in Washington State follow generalized methods and require cost-benefit analysis. Prior to this research project, the effects of current methodology had not previously been evaluated. The report outlines the results of research on the effectiveness of slope flattening in reducing the number and severity of collisions on Washington State highways in rural areas. A before and after study was performed by analyzing 3R and 2R projects in Washington State which included side slope flattening that were accomplished from 1986 through 1991. The study shows that side slope flattening reduces both the number and severity of collisions when compared to highway sections without side slope flattening. Even when including the effects of various non-structural initiatives which have helped reduce collisions, slope flattened sections exhibited lower collision rates. The research leads credence to current design practice which utilizes benefit-cost analysis when prioritizing roadside safety improvement projects.
总页数：	73p
报告类型：	科技报告