基于线性模型的高速公路交通事件和干预作用影响下的车流波分析

交通事件的发生导致高速公路正常交通流发生改变,为了促进发生交通事件时车流拥挤或阻塞的消散,减少排队延误,应在事件发生点上游对车流采取一定干预措施.运用流体力学车流波理论,分析了交通事件和干预措施综合作用下对车流状态的影响,建立了基于车速-交通密度线性模型下的车流波波速模型,干预作用产生的干预波和交通事件影响产生的集结波、启动波、消散波相互作用下的车流波位置和对应时刻模型以及分流干预措施解除时刻模型.这些模型为有效确定事件处理方案,尽快消除拥挤或阻塞提供了理论依据.

Linear Model Based Expressway Traffic-Flow Wave Analysis on the Influence of Traffic Incidents and Intervention Process

Owing to the influence of traffic incidents,natural expressway traffic flow will be influenced.In order to promote dissipation of traffic flow congestion or clog and reduce vehicle queue delay under the influence of traffic incidents,some intervention measures should be adopted in the upper reaches of the origin of traffic incidents.Based on hydrodynamic traffic flow wave theory,it is analyzed the interactive influence of traffic incidents and intervention measures on expressway traffic flow,established traffic flow wave speed model,traffic flow wave position models and corresponding time models under the interactive influence of intervention shock wave and concentration-wave,startup-wave and dissipation-wave result from traffic incidents and relieving diffluent intervention measures time model on the basis of linear model of speed related to traffic density.These models or critical parameters provide theoretical basis for effectively determining schemes to solve traffic incidents and quickly eliminating traffic congestion or clog.