Relationship between speed and traffic accident and speed limit on freeway  

作　　者：程国柱 裴玉龙 

机构地区：[1]Institute of Transportation Research,Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2008年第2期149-154,共6页哈尔滨工业大学学报（英文版）

基　　金：Special Research Fund for Doctoral Program of Higher Education of China(Grant No.20030213030)

摘　　要：To develop an equation between discrete degree of speed and traffic accident on freeway in China and give reasonable suggestions of speed management, the relation model was established between speed standard deviation and accident rate per 100,000,000 vehicle kilometers by regression analysis. The model shows that the more discrete is the speed distribution, the higher is the accident rate, which provides theoretical gist for speed limit on freeway. It is suggested that speed limit should be set according to 85th percentile speed obtained by the relationship between 85th percentile speed and RCCs (curvature change rate of single circular curve), and different speed limits should be set for cars and trucks. Through analyzing spot speed data of eight freeways in China, regression models were established between 85th percentile speed and RCCs and 15th percentile speed and RCCs. Reasonable speed limit suggestion values are put forward through these models.To develop an equation between discrete degree of speed and traffic accident on freeway in China and give reasonable suggestions of speed management, the relation model was established between speed standard deviation and accident rate per 100,000,000 vehicle kilometers by regression analysis. The model shows that the more discrete is the speed distribution, the higher is the accident rate, which provides theoretical gist for speed limit on freeway. It is suggested that speed limit should be set according to 85th percentile speed obtained by the relationship between 85th percentile speed and RCCs （curvature change rate of single circular curve）, and different speed limits should be set for cars and trucks. Through analyzing spot speed data of eight freeways in China, regression models were established between 85th percentile speed and RCCs and 15th percentile speed and RCCs Reasonable speed limit suggestion values are put forward through these models.

关 键 词：speed standard deviation accident rate per 100 000 000 vehicle kilometers RCCs speed limit 

分 类 号：U491[交通运输工程—交通运输规划与管理]