十字交叉口設(shè)置逆向可變車道后信號配時設(shè)計與仿真研究
[Abstract]:With the rapid increase in the number of motor vehicles in China in recent years, the phenomenon of urban traffic congestion is becoming more and more serious. Intersection is the key node of urban traffic, and the left-turn traffic flow is the most difficult part of the traffic flow at the intersection. Therefore, how to deal with the left-turn traffic flow is the key to alleviate urban traffic congestion. In order to reduce the influence of the left-turn traffic flow on the intersection, this paper proposes a method to reduce the impact of left-turn traffic flow on the intersection by periodically introducing the left-turn vehicle into the opposite exit lane in advance and then following the left-turn vehicle in the same direction to release the vehicle together on the premise of ensuring safety. Firstly, this paper introduces the background, main contents and technical methods of the research. In view of the current situation of urban traffic congestion, the paper introduces several methods of channelization, such as diversion island, widening of intersections, setting up waiting areas and variable lanes. And affirmed its to the present stage alleviates the city traffic jam the positive function. On the basis of the same direction variable lane, the method of setting the reverse variable lane is put forward, that is, the left turn vehicle flow borrows the opposite exit lane. In the third chapter, the definition of reverse variable lane is introduced, and the similarities and differences between the reverse variable lane and the common plane crossing channel are compared, and then the premise of setting the reverse variable lane is qualitatively analyzed. Then the length and width of the reverse variable lane are defined according to the urban road specifications. Finally, the control mode of the opening and closing time of the reverse variable lane in a period is proposed. In chapter 4, the basic concept of signal timing is introduced, and the combination of Webster timing method and dual objective optimal timing method and reverse variable lane is proposed. In the process of timing, not only the impact of the existence of the reverse variable lane on the intersection, but also the time of opening and closing of the reverse variable lane in a period should be considered. On this basis, a new channelization and timing scheme of the intersection should be formed. In the fifth chapter, the concrete process of setting up the reverse variable lane and optimizing in the actual engineering is introduced, which is based on a case study of a cross intersection in Qingdao. Finally, the significance of setting the reverse variable lane to the intersection is obtained by comparing the index parameters of the intersection before and after setting the reverse variable lane through the simulation software. Under the premise of increasing shortage of urban land, compared with other methods of channelization, the method of setting left turn and reverse variable lane is simple in construction and low in investment cost, so it can make full and effective use of existing space resources without using large projects. It provides a new direction for the traffic channelization of the city.
【學位授予單位】:北京交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:U491.23
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