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原文传递 Development of Safety Performance Measures for Urban Roundabouts in India

题名：	Development of Safety Performance Measures for Urban Roundabouts in India
其他题名：	Arndt,O.K.(1991)."Roundabout safety study:Effect of geometry on accident rate."Rep.DSB01,Transport Technology Div.,Queensland Dept.of Transport,Brisbane,Australia.
正文语种：	英文
作者：	S. Anjana
关键词：	Traffic crash;Intersection;Crash prediction model;Crash modification factor
摘要：	Roundabouts, although considered as safe among the various intersection types, have seen an increasing crash rate over the years in India. Geometric design of a roundabout directly influences the driver's speed adoption and maneuvering behavior, and hence plays a vital role in its safety performance. Application of treatments at roundabouts by altering the geometric design requires careful safety evaluation before actual implementation. The present study identified the crash causes and devised safety performance measures for urban roundabouts located in the state of Kerala, India. Crash prediction models and crash modification factors (CMFs) are developed in this study for the safety assessment of geometric design features of roundabouts. Of the many models tried, the zero-inflated negative binomial regression model is the best model to predict the crash frequency of roundabout approaches. Geometric features of the central island, circulatory roadway, and approach roads are associated with the crash occurrence on roundabout approaches. CMFs are developed by a cross-sectional method and are useful for investigating the relationship between safety and geometric design features of roundabouts.
出版年：	2015
论文唯一标识：	P-72Y2015V141N01003
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)TE.1943-5436.0000729
期刊名称：	Journal of Transportation Engineering
拼音刊名(出版物代码)：	P-72
卷：	141
期：	01
页码：	9-16