基于信号控制的城市路网旅行时间计算模型

摘要

The signal control is an important factor for real-time traffic accuracy, which influences on traffic flow obviously. In this paper, urban road network travel time calculation model based on signal control is proposed, which gets no interference real time traffic data by separating the influence from signal control. The travel time is divided into two components: Link Valid Travel Time(LVTT) and Intersection Delay Time(IDT): and an optimized signal control delay model is proposed to calculate the IDT accurately. Besides, a link merger algorithm is also developed. Experimental results show that the travel time accuracy error of Origin Destination(OD) can be reduced by 5%～15%.%交通控制信号对交通流的影响是干扰实时交通数据计算准确性的重要因素.为此,提出一种基于信号控制的城市路网旅行时间计算模型.将城市道路的旅行时间分为2个部分,即路链有效旅行时间和路口延误时间,设计改进的信号控制延误模型用于计算路口延误时长,并给出路链合并算法.实验结果表明,该模型起点到终点的旅行时间误差率能降低5％～15％.