摘要
以交通流理论为基础,用车速和车流密度来描述车流的运行状态。把“密度-速度”曲线图中车速、车流密度、畅行速度三者所围的三角形面积看作的交通拥挤损失量,将交通拥挤度定义为车流运行状态相对于畅行状态时的损失率,推导出拥挤度的计算公式,将该公式作为拥挤度的判定方法。假定道路上的车流服从用户平衡配流原则,则用户平衡状态时的车流运行状态即为拥挤平衡状态。用数值仿真的方法分析拥挤度随车流密度的变化趋势,及拥挤平衡的变化趋势。
Based on traffic flow theory, speed and density is used to describe traffic movement. The level of congestion has been modeled to relate to the triangle area enveloped by free speed, speed and density. The congestion equilibrium is the traffic movement under user equilibrium. Simulation is used to analysis the tendency of congestion equilibrium and the tendency of congestion level with density change.
出处
《系统工程》
CSCD
北大核心
2006年第10期105-109,共5页
Systems Engineering
关键词
交通工程
交通拥挤
交通流理论
拥挤度
用户平衡
Traffic Engineering
Traffic Congestion
Traffic Flow Theory
Congestion Level
User Equilibrium
