高速公路喇叭形互通式立交事故多发位置及成因分析

Analysis on the Accident Locations and Its Causes of Flared Expressway Interchanges

为识别喇叭形互通式立交事故多发位置,分析喇叭形互通式立交事故成因,以便为喇叭形互通式立交设计及事故黑点处置提供借鉴,采用现场调查方法,对浙江省已运营的喇叭形互通式立交进行调查,对收集到的施工图及事故等资料进行分析。结果表明,喇叭形互通式立交事故主要集中在互通出入口、A式喇叭形互通半直连式左转出口匝道S型曲线后半段、B式喇叭形互通环形出口匝道圆曲线前半段以及收费站内广场。该结果以期为喇叭形互通式立交安全设计指标的选取和安全保障提供参考。

In order to identify accident locations of flared interchanges,analyze the its causes,and provide references for the design of flared interchanges and the disposal of accidental blackspots,on-the-spot investigation method was used to conduct a survey on the flared interchanges of Zhejiang Province in operation.Construction drawings and accident data collected were analyzed.The results show that accidents are mainly concentrated in the interchange entrance and exit,the second half of the S-curve of the semi-straight left turn exit ramp of A-type flared interchanges,the first half of the circular curve on the circular exit ramp of the B-type flared interchanges and the inner square of toll stations.And they are helpful for the selection of safety design index and the safety guarantee of flared interchanges.