To investigate the trajectory characteristics of diverging vehicles on the tunnel-interchange section with short connection,this paper collected driving data from driving experiment conducted from Huangcao Interchange to Baojia Interchange of Baomao Expressway.Drivers'lane choice along the tunnel-interchange section with short connection were analyzed.Distributions were evaluated for the diverging sites,longitudinal and lateral distances of diversion,and average sideway rates.The study also analyzed the effects of the connection length between the tunnel and the interchange,driver factors,and developed the trajectory characteristics model.The results show that drivers have no obvious lane preference and are more likely to miss the mainline exit in the tunnel-interchange section with short connection.With a reduction in length of the connection,the proportion of lane change increases in the tunnel entrance while decreases in the tunnel exit,the number of vehicles approaching the diversion point increases,the longitudinal diverging length exhibits a decreasing trend while the lateral displacement and the average traverse rate show an increasing trend.When the length of the connection is no more than 170 meters,there is a significant difference in the diverging characteristics between the tunnel-interchange section with short connection and the common interchange exit.These indicate with a reduction in length of the connection,the difficulty of vehicle lane change and diversion increase,and operation risk increase.On the short connection,the female drivers and the drivers who are not familiar with the route tend to change lane late,and the longitudinal diverging length is short.The inexperienced drivers are prone to changing directly from the left lane to the taper of the interchange,resulting in large lateral displacement,which might associate with high risk in diverging.
关键词
交通工程/轨迹特征/实车试验/小净距"隧道—互通"/运行风险/个体差异
Key words
traffic engineering/trajectory characteristics/field test/tunnel-interchange section with short connection/driving risk/individual difference
万方数据