摘要
分析了高速公路立交入口区域车辆行车特征,提出了碰撞危险指数概念,考虑了碰撞可能性系数、碰撞车辆速度差、目标车道跟驰车辆在碰撞时的速度、加速度、前后车辆间距5个因素,将入口区域车辆可能发生的碰撞行为分为5种情形,研究了5种情形的发生条件,建立了相应的风险评价模型。针对不同的主线车辆运行车速、车头间距和匝道驶入车辆运行车速进行了三维数值模拟,得到了入口区域行车风险的变化规律。分析结果表明:主线运行车速越大,前后车辆间距越小,车速差越大,其行车风险也越大。
The traffic characteristics of freeway interchange entrance area were analyzed,and the concept of collision risk index（CRI） was put forward.The coefficient of collision possibility,speed difference between two colliding vehicles,colliding speed and acceleration of following vehicle,vehicle spacing on target lane were taken into consideration.Traffic collisions that may occur in entrance area were divided into five kinds,and the occurrence conditions and risk evaluation models of five cases were studied correspondingly.3D numerical simulation was carried out for different vehicle running speeds on main line,space headways,vehicle running speeds on entrance ramp,and the driving risk variation laws of entrance area were obtained.Analysis result shows that with higher running speed on main line,smaller vehicle spacing and higher speed difference,driving risk will increase.2 figs,13 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2011年第5期88-92,共5页
Journal of Traffic and Transportation Engineering
基金
国家863计划项目(2007AA11Z235)
