出口道展寬段對信號交叉口通行能力的影響分析
[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.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:U491.23
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