Study On Traffic Guidance And Control Strategy In Expressway Tunnel

Combining with the practice and the request of the construction of the expressway tunnel monitoring system in our country, this paper analyses and studies the problems existing in the traffic guidance and control system of the tunnels. After the analysis of the traffic flow characteristics of the tunnel, it introduces a suit of the macroscopic dynamic traffic flow models, which is suitable for its traffic characteristics. Based on the study of the characteristics of traffic flow, it introduces the automatic detection techniques of abnormal traffic incident, and sets up BP algorithms corresponding, which can tell whether there is a blocking or an abnormal incident or not. After the study on the theory of the highway tunnel monitoring system, this paper explains its function, composition and way of realization, and introduces four kinds of strategies in the case of traffic incidents. Based on the theoretical foundation, and as an example to BaiHushan tunnel, it introduces the patterns of the traffic guidance and control, and presents the way of the traffic control in four kinds of traffic situations (normal, crowded /blocking, traffic accidents, fire accidents). And with visual simulation soft??, this paper further simulates one common tunnel which is both long and large, then realizes the visual emulation of traffic elementarily.