出口道展宽段对信号交叉口通行能力的影响分析

发布时间：2018-11-20 19:08

【摘要】：在交叉口建设中,由于实地条件的限制,可能会存在出口道车道数与进口道直行车道数不匹配的情形,此时需要在出口道增加一条短车道,这就是出口道展宽。目前,出口道展宽的设计已在国内广泛应用,但由于目前国内缺少统一的规范,在实际建设中,往往存在一些问题。针对这个问题,本文在理论分析的基础上,提出了出口道展宽对交叉口通行能力的影响机理及其主要影响因素,并通过实地调查和VISSIM仿真来进一步研究出口道展宽的信号交叉口。实地调查中,本文采用对比分析的方法。本文调查了三类信号交叉口:(1)进出口道都是3条直行车道的信号交叉口;(2)进口道3条直行车道,出口道2条车道的信号交叉口;(3)进口道3条,出口道2条车道加1条展宽车道的出口道展宽信号交叉口。通过调查三类交叉口的进口道饱和车头时距,来分析出口道展宽段对信号交叉口通行能力的影响。在VISSIM仿真中,本文重点研究了出口道展宽对信号交叉口通行能力的影响及其两个主要影响因素,并使用MATLAB对仿真数据进行建模,来研究进口道直行车道的通行能力与单位周期内绿灯时间长度、出口道展宽段长度之间的函数关系,并对函数进行了进一步分析。通过研究,本文得出以下结论:(1)目前的HCM2000的通行能力计算方法不适合出口道有展宽段的交叉口。HCM2000的方法估算出的交叉口通行能力值偏大。(2)在出口道车道数少于进口道直行车道数的交叉口,增设一个出口道展宽段可以有效提高交叉口的通行能力;(3)出口道展宽交叉口的通行能力随着展宽段长度增加而增加,但是增加速率会越来越低。(4)出口道展宽交叉口的通行能力随着绿灯周期时长的增加而降低,而且降低的速度越来越低。
[Abstract]:In the construction of intersections, due to the restriction of the actual conditions, there may be the situation that the number of exit lanes does not match the number of the direct lanes of the entrance road. At this time, it is necessary to add a short lane to the exit lane, which is the widening of the exit lane. At present, the design of outlet widening has been widely used in our country, but there are some problems in the actual construction because of the lack of uniform norms in our country. In order to solve this problem, based on the theoretical analysis, this paper puts forward the influence mechanism of exit widening on intersection capacity and its main influencing factors. And through field investigation and VISSIM simulation to further study the exit widening signal intersection. In the field investigation, this paper adopts the method of comparative analysis. In this paper, three kinds of signalized intersections are investigated: (1) the signalized intersections of three direct lanes, (2) the signalized intersections of 3 straight lanes and 2 lanes of exit roads, respectively. (3) 3 entrance roads, 2 exit lanes and 1 widening lane. The influence of the widening section of exit lane on the capacity of signalized intersection is analyzed by investigating the saturated headway time distance of three kinds of intersections. In VISSIM simulation, this paper focuses on the influence of exit widening on signalized intersection capacity and its two main influencing factors, and uses MATLAB to model the simulation data. To study the functional relationship between the capacity of the entrance lane and the length of the green light time per unit cycle and the length of the widening section of the exit lane, and to further analyze the function. Through research, The following conclusions are drawn in this paper: (1) the current HCM2000 capacity calculation method is not suitable for the intersection with a widening section of the exit lane. The HCM2000 method estimates the intersection capacity value is too large. (2) the number of lanes at the exit lane is small. The intersection with the number of lanes on the entrance road, The capacity of intersection can be improved effectively by adding a widening section of exit. (3) the capacity of the exit widening intersection increases with the length of the widening section, but the increasing rate will be lower and lower. (4) the capacity of the exit widening intersection decreases with the increase of the green light period. And the rate of decline is getting slower and slower.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.23

【参考文献】