多车种混合条件下的交织区车流仿真建模与特性分析

发布时间：2018-08-18 17:16

【摘要】：摘要：交织区是快速路系统中不可或缺的重要组成部分,交织区内的车辆必须在一定的长度限制范围内换入到目标车道,频繁换道使得交通流由稳定状态转变为紊乱状态。而快速路中广泛存在的大型车辆由于其体积较大、速度较慢对交织区的运行效率影响更大。对多车种混合条件下的交织区交通流特性进行分析有助于深入理解瓶颈处拥堵的产生机理,从而为交织区车流的优化控制提供理论支持。本文建立了多车种混合条件下的交织区仿真模型。分析了多车种混合条件下交织区、入匝道系统及出匝道系统交通流演化特性,并分析多车种混合对交织区通行能力的影响。最后分析了辅路控制对交织区交通流特性的影响。主要研究成果包括以下几个方面： (1)建立了基于元胞自动机的多车种混合条件下的交织区仿真模型。分析多车种混合条件下交织区系统中的车流特性,研究发现：大型车比例越大,其较大的体积及较慢的速度对系统内车辆的运行影响越大,系统越容易达到拥挤状态,系统的最大饱和流量越小。当车流量较小时,大型车辆的增多不会对交织区造成很大影响；当车流量较大时,大型车的增多会严重降低交织区内车辆的运行效率。 (2)分析了交织区内交通运行状态的各种影响因素,并研究了基于交织流量比、交织比的交织区通行能力模型。仿真结果表明,当交织流量比以及大型车比例增大时,交织区通行能力会迅速减小。对多车种混合条件下的交织区通行能力模型进行了拟合,得到了较好的拟合效果,所提出的模型可以用于交织区通行能力分析。 (3)分析了辅路控制对出匝道车辆运行的影响。当对辅路进行控制时,辅路对出匝道车辆的影响减小,出匝道车辆可以在较短的时间内驶入辅路,从而使得交织区系统以较高的效率运行。当不对辅路进行控制时,辅路对出匝道车辆影响较大,出匝道车辆不能及时驶出交织区系统,造成交织区系统拥堵,影响快速路车辆运行。
[Abstract]:Absrtact: interleaved area is an indispensable part of expressway system. Vehicles in interlaced area must change into the target lane within a certain limit of length, and frequent traffic flow changes from stable state to chaotic state. Because of its large volume, slow speed has more influence on the operation efficiency of interlaced area. The analysis of traffic flow characteristics in interleaved areas under the condition of multi-vehicle mixing is helpful to understand the mechanism of traffic congestion at bottlenecks and provide theoretical support for optimal control of traffic flow in interleaved areas. In this paper, a simulation model of interleaved zone is established under the condition of multi-vehicle mixing. In this paper, the traffic flow evolution characteristics of interleaving zone, on-ramp system and off-ramp system under the condition of multi-vehicle mixing are analyzed, and the influence of multi-vehicle mixing on the capacity of interleaved zone is analyzed. Finally, the influence of auxiliary road control on traffic flow characteristics in interlaced area is analyzed. The main research results are as follows: (1) the simulation model of interleaved region based on cellular automata is established. This paper analyzes the characteristics of traffic flow in the interlaced zone system under multi-vehicle mixed conditions. It is found that the larger the proportion of large vehicles, the greater the impact of the larger volume and slower speed on the running of the vehicles in the system, and the easier the system is to reach the congested state. The maximum saturated flow of the system is smaller. When the traffic flow is small, the increase of large vehicles will not have a great impact on the intertwined area; when the traffic is large, The increase of large vehicles will seriously reduce the operational efficiency of vehicles in the interleaved area. (2) the factors affecting the traffic state in the interleaved area are analyzed, and the interleaved traffic capacity model based on the interleaved flow ratio and interleaved ratio is studied. The simulation results show that when the interleaved flow ratio and the ratio of large vehicles increase, the capacity of interleaved area decreases rapidly. The capacity model of interleaved area under the condition of multi-vehicle mixing is fitted, and a good fitting effect is obtained. The proposed model can be used to analyze the traffic capacity in interlaced areas. (3) the influence of auxiliary road control on off-ramp vehicle operation is analyzed. When the auxiliary road is controlled, the influence of the auxiliary road on the off-ramp vehicle is reduced, and the off-ramp vehicle can drive into the auxiliary road in a relatively short time, thus making the interleaved zone system run with higher efficiency. When the auxiliary road is not controlled, the off-ramp vehicle has a great influence on the off-ramp vehicle, and the off-ramp vehicle can not drive out of the interleaving zone system in time, resulting in the interleaving area system congestion and affecting the operation of the expressway vehicle.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491

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