出入口设计对主线车辆速度波动影响分析

Analysis of Effect of Design of Access on Mainline Vehicle Speed Fluctuation

出入口的进出交通与主线车流形成的冲突,导致了对主线车辆行驶状态较严重的干扰。文中总结了出入口设计对主线车辆速度波动的关键影响因素,并提出表征车辆速度波动程度的评价指标。基于Vissim仿真和实际数据标定,研究双向4车道的三种典型出入口设计模式随交通量变化、出入口布局(间距/数目)变化的速度波动情况,并分析主要影响因素的显著性差异,最后对不同设计模式作适用性讨论。

The traffic conflicts of access with mainline vehicle flow results in heavy interference on the running state of mainline vehicles.The paper summarizes major influences of access design on mainline speed fluctuation,and proposes the evaluation indexes for characterization of vehicle speed fluctuation.Using VISSIM software and field data in model calibration the paper evaluates the speed fluctuation degree of three types of access for dual four-lane carriageway as traffic volume changes,and makes comparison on significance difference of several main influence factors.Finally,the applicability of different types of design model is also discussed.