城市干道信號控制交叉口間距研究
[Abstract]:With the increasingly prominent urban traffic problems, urban trunk road traffic facilities space optimization problem has been paid attention to. As an important part of urban trunk road spatial optimization, reasonable signal control intersections can help to reduce traffic congestion, improve safety level, improve road traffic engineering facilities, and manage main road intersections. Energy conservation and environmental pollution reduction have a certain beneficial effect. At present, the single-point signal control system has been difficult to alleviate the urban traffic pressure. The popularization and rational application of coordinated control system of trunk road signal has become an inevitable trend of urban road network signal control. However, there is a lack of systematic specification and research results in China for the signal coordinated control intersection of urban trunk roads. At present, there are many phenomena such as high density of signal-controlled intersection and random location on urban roads. This phenomenon not only affects the function of coordinated control of trunk roads, but also easily forms a hidden safety hazard. Based on the correlation degree of intersections, this paper presents a method for determining intersections spacing, which is suitable for coordinated control of trunk roads. Firstly, the paper analyzes the traffic safety and efficiency of signal-controlled cross intersection. Based on the analysis of traffic flow law, driver behavior and vehicle traffic behavior at intersections, the traffic safety of signalized intersections of urban trunk roads is expounded. By analyzing the traffic signal control mode, control parameters and coordination mode of intersection, the traffic efficiency of signalized intersection of urban trunk road is discussed. Secondly, by analyzing the vehicle perceptual response, braking, queuing and other operations, the upstream functional area length model of signal-controlled intersection is proposed, and the parking horizon is selected as the downstream functional area length calculation model. This paper analyzes the vehicle lane changing behavior between adjacent functional areas of intersection, and puts forward a model for calculating the minimum safe distance between intersections in combination with the safety crossing horizon. Then, the paper analyzes the implementation conditions, traffic flow distribution characteristics and maximum allowable intersections spacing of the trunk line coordinated control system. Based on the analysis of supersaturated state and signal period, the relationship between intersection correlation and the coordinated control of intersections is put forward. The discrete correlation degree and the block correlation degree are considered synthetically, and the path correlation degree is regarded as the criterion to judge the priority level of coordinated control in intersection. The circular iterative algorithm is used to calculate the intersections spacing. Finally, the paper selects the trunk road network composed of the actual intersection as the research object, deduces and simulates the measured data, and verifies the validity of the method proposed in this paper. The efficiency of the model is compared by travel time and delay, and the model is evaluated objectively. In this paper, the distance model of trunk road intersections is studied. It is found by simulation that the travel time of trunk roads is shortened and the delay is reduced when the intersections' spacing is improved. The research results show that reasonable intersections spacing controlled by trunk signal is helpful to improve the operation efficiency of urban trunk road intersections and to improve the rationality of traffic engineering facilities, which is worth popularizing, applying and studying deeply.
【學(xué)位授予單位】:福州大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:U491.54;U491.23
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