基于匝道控制的快速路合流区通行能力分析

Capacity of Expressway Merging Area Based on Ramp Metering Methodology

对快速路合流区交通运行特性进行了研究,由交通调查数据得出合流影响区汇入车辆数与主线车道交通量的关系。通过研究合流区通行能力及其影响因素,由交通运行特性及运营管理的需要,给出了合流影响区通行能力定义;用实地调查数据并借助交通仿真技术对分析需要数据进行补充,得出主线到达流率、汇入流量和合流影响区通行能力三者间的关系。应用回归分析方法得出快速路合流影响区通行能力计算模型,并借鉴RWS-C控制策略提出基于影响区通行能力的匝道控制方法。

First,the traffic operating characteristics are analyzed.The relationship between merging traffic volume through on-ramp and traffic flow in mainline is obtained.The capacity and its influencing factors of expressway merging area are analyzed based on the field data and simulated data.The definition of capacity for merging influence area is developed according to the traffic operational characteristics and management demand.The relationship between merging influence area capacity and upstream traffic flow in mainline together with on-ramp traffic flow is presented.With linear regression method,the capacity estimating model of merging influence area is proposed.At last,the ramp metering methodology is suggested based on that capacity model as well as RWS-C control strategy.