关键词: 交通流, 奥运会, 交通诱导信息, VMS, 断面中心法, 路段中心法

Abstract: During the Beijing Olympics, the traffic guidance by VMS(Variable Message Signs) gained excellent effects. Road condition dynamic and quantitative information which was released during the Olympics provided travelers with real-time road conditions and travel time of main Olympic lines. This study discussed the VMS traffic information release based on traffic flow real-time detecting. It introduced the logical structure of the Olympic traffic guidance VMS information release. The data process of the VMS release is presented based on the collected original data, and certain methods on data process are discussed. This study also discussed the self-generation model of VMS traffic guidance information. It proposed the mid point-centered method and section-centered method to calculate travel time and average speed. In the last section, it provides practical effects of proposed model algorithm in the Olympic traffic guidance VMS release.

Key words: traffic flow, Olympics Games, traffic guidance information, VMS(variable message signs), mid point-centered method, section-centered method