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A Study for Developing On-line Traffic Control System Model for Urban Expressway

城市快速路在线交通控制系统模型开发研究

基本信息

批准号：
10555184
负责人：
LIDA Yasunori
金额：
$ 2.82万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

This study aims at developing an on-line traffic control system model for urban expressway. This study is composed of the following four research topics.1) The first topic is to develop the LP (Linear Programming) type inflow control model that uses the traffic data obtained in the real-time manner as much as possible. The inflow model explicitly considers time-dependent changes in traffic demand and travel speed. Also the model includes the driver's route choice model for the future extension of urban expressway network.2) This study also proposed a "meso" traffic simulation model by which control schemes for urban expressway can be evaluated. The model has strong points both of macroscopic and microscopic simulation models. Each vehicle is assumed to travel according to traffic condition updated through macroscopic procedure. This assumption leads to the characteristic that the destination and route of each vehicle can be explicitly considered in the model. The validity of model was confirmed through the comparison between observed and estimated traffic conditions.3) In order to enhance the practicability of both the traffic simulation model and the inflow control model, it is necessary to develop the method to estimate dynamic OD traffic volume. This study proposed the method for estimating dynamic OD traffic volume from traffic counts and AVI (Automated Vehicle Identification) data. The method originates from the least square method for the error between observed and estimated traffic volumes.4) A system model for on-line traffic control for urban expressway was developed by integrating the inflow control model, the meso traffic simulation model and the method for estimating dynamic OD traffic volumes. The validity and practicability of the system model was confirmed by some cases of numerical examples for an urban expressway network.

本研究旨在建立一个城市快速路交通控制系统模型。本研究由以下四个研究课题组成。1）第一个课题是开发尽可能多地使用实时获得的交通数据的LP（线性规划）型流入控制模型。流入模型明确地考虑了交通需求和旅行速度的时间依赖性变化。该模型还包括未来城市快速公路网延伸的驾驶员路径选择模型。2）本研究还提出了一个“中观”交通仿真模型，可以通过该模型来评估城市快速公路的控制方案。该模型兼有宏观和微观仿真模型的优点。假设每辆车根据通过宏观过程更新的交通状况行驶。这一假设导致的特点，每辆车的目的地和路线可以显式地考虑在模型中。通过实测交通状况与预测交通状况的对比，验证了模型的有效性。3）为了提高交通仿真模型和流量控制模型的实用性，有必要发展动态OD交通量的预测方法。提出了一种基于交通量和车辆自动识别（AVI）数据的动态OD交通量估计方法。该方法来源于观测交通量与估计交通量之间误差的最小二乘法。4）将流入控制模型、中观交通仿真模型和动态OD交通量估计方法相结合，建立了城市快速路在线交通控制系统模型。以某城市快速路网络为例，验证了系统模型的有效性和实用性。