城市路网路段行程时间预测研究综述

A Survey on the Link Traffic Time Prediction for Urban Road Net

交通诱导系统是已被证明的可提高道路通行能力的有效手段。交通诱导可归结为寻找赋权有向图最短路径问题,而所赋权值为路段行程时间,因此,路段行程时间是交通诱导系统重要的基础数据,准确预测路段行程时间对提高诱导系统,缓解城市交通拥堵具有重要的现实意义。对路段行程时间预测方法进行了综述性的分析和讨论,从行程时间预测所用特征和方法角度对现有方法进行介绍和分析,最后对未来可能的发展和研究问题提出了一些预测性意见。

It has been proved that traffic guidance is an effective method to enhance the traffic capacity of road net. Traffic guiding can be summed up to find the shortest route from a weighted digraph, in which the weight value is equivalent to the travel time of the interesting link. Thus, link travel time is the fundamental data for traffic guid- ance, and the accuracy of link travel time prediction plays an important role in improving the traffic guidance system and relieving traffic congestion of road net. This paper surveys the methods which are related to the link travel time prediction, and proposes some potential problems based on the analysis of existing prediction methods.