Evaluation Research Of The Freeway Traffic System Brittleness Stimulation

In recent years, due to the traffic incident, reports of freeway congestion evenserial accidents and cascading failure are common occurance. Freeway systemcascading failure led to the widespread failure made larger influence on regionaltraveler travel. As a new direction of a complex system, brittleness theory can well fitthe characteristics of freeway system. Therefore, for the freeway the brittleness of thestudy is necessary. Paper on the basis of the theory of brittleness,research the freewaytraffic system brittle essence and stimulated condition. To explore the capacity offreeway system in the face of emergencies strain.This paper firstly studies the brittleness theory feasibility of the application in thefreeway system. Through the analysis of environment of complex system both insideand outside, to explore the basic characteristics of freeway traffic system brittleness, andfurther analysis the essence cause of system to produce brittle, and excitation conditionof system brittleness.System under interference of the environment inside and outside, namely brittlefactors of interference, it will be destroyed at the same time trigger system brittleness.This is the objective external cause that system brittleness is triggered. The factorsinfluencing system brittleness are diverse, such as influence of bad weather conditions,the quality of road conditions, traffic accidents lead to seal way, etc. In this paper, basedon the Dematel method to establish the system brittleness factor identification model, toidentify and analyze the brittleness factors of traffic system.The condition of system brittleness be inspired is the brittle source interferenced byinternal and external environment and break down. The essence condition of systembrittleness be inspired is system to achieve self-organization critical state. Therecognition of the critical state for freeway traffic system brittleness research isnecessary. Using VISSIM software Consider system is under interference the mainbrittle factors conditions Explore the critical state of the subsystem unit brittleness beinspired, namely the critical capacity of brittle source after brittle factors affected.Brittle source of system be interferenced leading to failure is the condition ofsystem brittleness be inspired. So for the system is very important to evaluate andanalyze the brittle source. This paper referring to the methods of cascading failurethought, put forward the freeway transport system brittleness source evaluation indexand evaluation method, and assess the brittle source by an example of the freewaynetwork in heilongjiang province.