北京市快速环路速度-密度模型研究

Research on Traffic Stream Speed-Density Model of Beijing Urban Expressway

以北京市快速环路系统为研究对象,对微波检测器(RTMS)获得的交通流数据进行处理分析,研究北京市快速环路交通流运行特征,建立了速度＿密度模型.同时分析了北京市快速环路速度＿密度模型在快速路研究中的作用,指出了快速路出入口对保持自由流速度的不利影响.这为交通控制优化、车流波形成机理的研究提供了基础.

This paper takes the Beijing expressway system as the research object, analyzing the traffic flow data RTMS detectors, investigating the ring road traffic flow characteristics, to establish the speed & density relationship model. The research results give an evidence of ramp metering influence on speed-density model. It's useful for the study of traffic control optimization and shockwave formation mechanism.