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A Simulation Study on Influence of Automated Highway System on Traffic Flow

自动化公路系统对交通流影响的仿真研究

基本信息

批准号：
11650551
负责人：
TSUKAMOTO Naoyuki
金额：
$ 0.9万
依托单位：
Osaka Sangyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650551/
关键词：
ITS AHS Traffic simulation Traffic flow Car running experiment Car action Car Following Theory Road capacity 車両拳動

项目摘要

The purpose of this study is to analyze the influence on the road traffic flow caused by the implementation of AHS (Automated Highway System) using a micro simulation model. In the research, the following work is done ; First, the data is collected through car running experiments. A microscopic traffic flow simulation model is made based on Car Following Theory and the model parameters are estimated on the basis of the collected data. Finally, the influence of AHS on traffic flow is analyzed using the simulation model.In the experiments, a variety of data is collected using GPS installed cars. The GPS device installed to each car observes the velocity and location every second and based on those data, the headway and the reaction time-lag data can be calculated. Using this method, the data on various kind of traffic conditions and road conditions can be obtained. The summary of the observation is as follows ;1.The mean reaction time lag is different between the traffic jam hours and non-jam hours. The mean time lag is approximately 2.1 seconds in non-jam hours, and contrarily it is 2.7 seconds in jam hours.2.The time lag is 3.4 seconds on express highway which is 1.3 seconds longer than that on ordinal streets.On the basis of those data, a microscopic traffic flow simulation model is made and some case studies are performed using the model. The case studies are focused on the rate of AHS installed cars and the change of road traffic volume capacity corresponding to the rate is simulated. As a result, the rate of 50% over causes a large influence to the capacity, but the rate of 80% over does not bring the more change to the capacity.

本研究旨在利用微观仿真模型，分析自动化公路系统（AHS）的实施对道路交通流的影响。在研究过程中，主要做了以下工作：首先，通过汽车行驶试验收集数据。基于跟驰理论建立了微观交通流仿真模型，并根据采集的数据对模型参数进行了估计。最后，利用仿真模型分析了AHS对交通流的影响。安装在每辆车上的GPS设备每秒观察速度和位置，并根据这些数据计算车头时距和反应时滞数据。利用该方法，可以得到各种交通状况和道路状况的数据。研究结果表明：1.交通拥挤时与非拥挤时的反应时滞存在差异。在此基础上，建立了微观交通流仿真模型，并进行了实例分析。以AHS的汽车安装率为研究对象，模拟了道路交通容量随AHS安装率的变化。结果表明，50%以上的速率对容量产生较大的影响，而80%以上的速率对容量的影响不大。