Analysis Of Traffic Flow State Evolution Under The Influence Of Typical Traffic Incident

Nowadays,with the rising of urban vehicle amount,urban traffic load is going serious.Because increasing of the urban road expansion is far behind gross vehicle,transport supply can’t meet the demand of traffic.Typical traffic events can aggravate urban traffic pressure,that is more test of the urban traffic capacity.Therefore,scholars and managers of traffic realm put forward a lot of traffic management and control measures,however,the management and control measures for traffic flow is equal to the external forces forced to intervene.The results of existing research often ignore the internal organization of traffic flow.The emergence of the self-organizing theory provides a new idea and direction for transportation scholars to think traffic flow,the focus of the self-organized study is to explore the continuity of internal system evolution and the possible discrete consequences by the evolution.Based on a lot of reading about the self-organization theory and traffic flow theory at home and abroad,using the existing research results,first of all paper gives a typical traffic events related introduction,then respectively from the micro and macro two aspects analyzes the traffic flow self-organization evolution under the influence of typical traffic events.Microcosmic point of view,mainly from the people’s point of view of the inner components of the traffic flow.Paper analysis the typical traffic events influence on drivers travel decision-making,proves the driver’s initial OD changes under the influence of the typical traffic events,thus affecting the region even the whole city traffic flow distribution.Macro point of view,determine the self-organization theory is suitable for the urban traffic system,and mutation theory was applied to urban traffic system.Typical traffic events along with the rapid increase of traffic volume,it causes the urban traffic system status changes from clear to jam,mutation theory discusses the critical state of these two kinds of system status,the mutation model of urban traffic system is established,and the various causes of system mutations are analyzed,and finally,using the computer simulate the results of traffic flow self-organization before and after the urban traffic system mutation,the balance state before the mutation adopts the Wardrop equilibrium principle.In this paper,the research for deepening understanding traffic flow mechanism of internal organization theory research as well as for the real function such as traffic management have important significance.