The Research Of Freeway Early Warning System Based On Fault Tree Analysis Theory

The rapid development of the freeway brings people great convenience inproduction and life. Casualties and property losses caused by freeway traffic accidentsis also crucial owing to its own characteristics and requirements. Prevention anddecrease of expressway traffic accident is not only the basic condition of keeping theexpressway traffic operation system normal, but also an important direction of thetraffic safety research.The motivation of this article is to improve the security level of freeway operationsystem by establishing freeway traffic safety early warning system to prevent andreduce traffic accidents, aiming at the severe situation of expressway traffic accidents.Paper mainly includes the following aspects:（1）The paper summarize the feature of the freeway and freeway traffic accidentsfrom four aspects of human, vehicle, road, environment to analyze the influential factorsof the expressway traffic safety in detail, providing the theoretical support for buildingearly warning model condition attribute collection.（2）Taking the early warning and warning management theory into the field offreeway traffic safety, expound the definition, the basic principles, the methods andstandards, the analysis and control counter measures, the system function of warning indetail, build the basic structure of expressway traffic safety warning system, laytheoretical foundation for the establishment of an early warning system. This paperintroduces several common forecasting models, using ABC analysis screening freewayaccidents influence factors of the main influence factors and major accident form as thebasic event of the fault tree and time top events. Finally builds freeway traffic safetyearly warning model based on the fault tree analysis theory. （3）Draw a conclusion of the influence factors of expressway accident andcorresponding relationships between accident patterns based on the analysis of earlywarning model, obtain major accident influence factors through the structure importantdegree calculation, point out the main monitoring objects for early warning andmonitoring system.（4）Build the safety early warning system of freeway traffic based on the faulttree analysis theory after describing the existing early warning subsystem in detail.