基于VISSIM仿真的互通入口匝道与平交口进口道组合路段运行影响因素分析及间距确定

Analysis on Influencing Factors and Spacing Determination of Combined Road Section of Interchange On-ramp and At-grade Intersection Entrance Based on VISSIM Simulation

摘要:

随着城镇化地区公路功能的不断发展，城镇化地区一级公路已然成为服务对象齐全、行车速度高、车速离散度大的矛盾集中凸显的公路。为提高城镇化地区一级公路的通行能力以及安全性，以入口匝道与平交口进口道的理论间距计算为基础，进行VISSIM仿真实验设计。分别针对匝道交通量分布、平交口转向交通量、交通组成、匝道与平交口进口间距4种影响因素进行仿真分析，从车辆运行速度、延误和排队的角度分析入口匝道-平交口进口道各组合类型路段的车辆运行特征，并提出互通入口匝道与平交口进口道间距的设计建议。

Abstract:

With the continuous development of the functions of highways in urbanized areas, the first-class highways in urbanized areas have become the ones where the contradictions of having a complete range of service targets, high driving speeds and large vehicle speed dispersion are prominently displayed. To enhance the traffic capacity and safety of first-class highways in urbanized areas, a VISSIM simulation experiment design is carried out based on the theoretical spacing calculation between the on-ramp and at-grade intersections. The simulation analyses are respectively conducted for four influencing factors of ramp traffic volume distribution, at-grade intersection turning traffic volume, traffic composition, and the spacing between ramps and at-grade intersection entrances. The vehicle operation characteristics of various combined type road sections from on-ramps to at-grade intersection entrances are analyzed from the perspectives of vehicle operation speed, delay and queuing. And the design suggestions for the spacing between interchange on-ramps and at-grade intersections are put forward.