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《China Journal of Highway and Transport》 2004-01
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Research on the relationship between discrete character of speed and traffic accident and speed management of freeway

PEI Yu-long, CHENG Guo-zhu (School of Traffic Science and Engineering, Harbin Institute of Technology, Harbin 150090, China)  
The relation model is established between speed standard deviation and accident rate per 100 000 000 vehicle kilometers by regression analysis. The model shows that the more discrete speed distribution causes the higher accident rate, which provides theoretical gist for speed limit on freeway. Through analyzing spot speed investigation data of fourteen freeways in China, regression models are established between 85th percentile speed and CCRs (curvature changing rate of single circular curve) ,15th percentile speed and CCRs. Reasonable speed limit suggestion values are put forward through these models.
【Fund】: 交通部行业联合科技攻关项目(95-05-01-14)
【CateGory Index】: U491.4
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