平面信控交叉口右转车辆与过街行人交通冲突研究

发布时间：2018-10-11 10:45

【摘要】：随着社会经济的快速发展,人们出行的日益频繁,城市道路在生活中扮演着重要角色,交叉口的运行状况反映着整个路网的运行效率。信控道路交叉口作为城市道路中的重要节点,是交通冲突发生的主要地点。未设置右转专用相位的信控道路交叉口右转车辆在转弯过程中会与过街行人产生较为频繁的交通冲突,这种冲突会导致右转车辆的加减速及停车,致使右转车辆产生延误,影响整个交叉口的运行效率,同时也会威胁过街行人的人身安全。在右转车辆穿越过街行人流的过程中,有的右转车辆急于行驶或缺乏交通知识,会与过街行人抢行,这种行为虽然减少了右转车辆的延误,但增加了过街行人的危险。针对这一问题,本文的研究内容包括:(1)通过对未设置右转专用相位的信控道路交叉口右转车辆穿越过街行人流的微观分析,采用视频观测与人工观测相结合的办法,建立过街行人泊松分布过街时右转车辆的抢行概率模型,并在此基础上建立并验证了未设置右转专用相位的信控道路交叉口右转车辆穿越过街行人流的延误模型。(2)在考虑右转车辆抢行的基础上建立了过街行人等概率分布过街时信控道路交叉口右转车辆穿越过街行人流的延误模型。(3)优化了过街行人穿越右转专用车道时的安全心理距离模型,对过街行人的安全心理进行了分析,利用冲突能量定性描述了冲突危险度并对长沙市交叉口冲突危险度做了计算。
[Abstract]:With the rapid development of social economy, people travel more and more frequently, urban roads play an important role in life, the operation of intersection reflects the operation efficiency of the whole road network. As an important node in urban road, signal-controlled road intersection is the main place of traffic conflict. The right-turn vehicle of the signal-controlled road intersection without the special phase of right-turn will produce more frequent traffic conflicts with pedestrians during the turning, which will lead to the acceleration, deceleration and parking of right-turn vehicles, resulting in delay of right-turn vehicles. At the same time, it will threaten the safety of pedestrians. In the process of right-turn vehicles crossing the street, some right-turn vehicles are eager to drive or lack the knowledge of traffic, so they will rob the pedestrians. Although this behavior reduces the delay of the right-turn vehicles, it increases the danger of pedestrians crossing the street. Aiming at this problem, the research contents of this paper are as follows: (1) the method of combining video observation with manual observation is used to analyze the traffic flow of right-turning vehicle crossing the street without the special phase of right-turn. In this paper, the probability model of the right turning vehicle when the pedestrian Poisson distribution is crossing the street is established. On the basis of this, a delay model of right-turning vehicles crossing the street crossing is established and verified without the special phase of right-turn. (2) based on the consideration of right-turn vehicle grabbing, the equal probability fraction of pedestrians crossing the street is established. When crossing the street, the delay model of the right-turn vehicle passing through the pedestrian flow at the intersection is optimized. (3) the safety psychological distance model of the pedestrian crossing through the right-turn lane is optimized. In this paper, the safety psychology of pedestrians crossing the street is analyzed, the conflict risk degree is described qualitatively by conflict energy, and the conflict risk degree at Changsha intersection is calculated.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491

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