不同交通信息下网络交通动态路径选择行为

Influence of Different Traffic Information on Drivers' Dynamic Route Choice Behavior in Urban Road Network Level

为从道路网络层面实现对城市交通的有效诱导,达到均衡交通流分布、提高交通整体运行效率的目的,在一个典型路网上,研究利用可变信息标志(variable message sign,VMS)提供不同交通信息内容条件下的驾驶员动态路径选择行为.针对地面道路上一块文字式VMS和快速路上一块图文混合式VMS,采用陈述偏好调查法采集交通行为数据,并用离散选择行为方法分析数据,建立了提供路径行程时间信息、交通状态信息和交通事故信息条件下驾驶员动态路径选择行为模型.分析结果表明,可变信息标志发布路径交通信息的精确性、完整性,驾驶员的个人属性等,是影响路径选择行为的主要因素.研究结果可为先进的出行者信息系统的规划建设和信息发布策略的制订等提供依据.

In order to guide traffic in road network level, to equilibrate traffic distribution and improve traffic efficiency in a macroscopic level, the paper presents a study of the drivers＇ dynamic route choice according to the varying traffic information provided by variable message signs （VMS） of advanced traveler information system （ATIS） in a typical urban road network. Fur a VMS with only literal information set on surface-street, and a VMS with both literal and graphic information set on urban freeway, State Preference （SP） survey is carried out to investigate traffic behavior data, which are then analyzed by d/saggregate choice behavior method. A dynamic route choice behavior model is founded,which is suited for situations when travel time, traffic conditions, and information of traffic incidents of different routes are known. Results show that the veracity and integrality, and the personal characteristics of drivers are main factors to impact the route choice behavior. The study provides a basis for founding ATIS and setting optimal strategies of information promulgation.