Design And Implementation Of Traffic Emergency Evacuation Simulation System For Large-scale Activities

With the rapid development of China’s economy,more and more international-level large-scale events are held in China,which brings many challenges to China’s road traffic.The crowds of people and vehicles brought by large-scale events may cause traffic jams in the surrounding areas after the event ends,and may even cause traffic accidents.This brings great inconvenience to citizens’ travel and life.Therefore,municipal traffic managers urgently need to find solutions to the traffic congestion caused by the discontinuation of large-scale events.Among the many factors that affect the traffic of the road network around large-scale events,the regulation of the traffic in the area by the intersection signal lights and the driving path of the vehicles after the event has ended are two very key factors,which are also an important part of modern traffic management.After a large-scale event is dismissed,adjusting the surrounding area signal lights and inducing the driving route of vehicles in the road network to alleviate the traffic impact caused by the dismissal of the event is a common method for traffic management personnel to solve such problems.Under the above background,this paper studies the shortcomings of large-scale event traffic management methods,combined with the technical advantages of simulation scene construction,optimal route search,and front-end separation system development,design and implement a large-scale event traffic emergency evacuation simulation system,aiming to help municipal traffic managers systematically manage the large-scale events frequently held in the city,and quickly evacuate the regionally congested vehicles in the scene with high efficiency and low cost to eliminate the traffic impact caused by large-scale events.This paper first conducts an in-depth investigation and research on related technologies and theories.Aiming at the key problems and difficulties in the system,this paper designs reasonable solutions and algorithms:The first point is to restore the traffic simulation scene after the activity.Designed a set of vehicle flow generation algorithms based on the current road network by analyzing the road network files and analyzing the direction of the scattered traffic flow,and wrote the vehicle flow into the vehicle flow file,and configured the road network and the vehicle flow to construct a simulation scene;the second point is the road network in the adjustment of traffic lights,this paper designs a road network area vehicle flow balance model based on the characteristics of the traffic environment after the event ends.The road conditions are input into the model to obtain the signal light adjustment plan and automatically adjust it;the third point is for the vehicles participating in the event to driving route guidance after escaping,this article comprehensively considers the current road traffic density and signal light phase conditions,and designs a vehicle route calculation method for dynamic road networks.The optimal driving path can be dynamically calculated according to changes in road traffic conditions to enable vehicles drive away from congested areas faster.According to the usage scenarios and functional requirements of the system,this paper carries out the architecture design,detailed design and specific realization of each functional module of the system,and implements the traffic simulation scenario building module,traffic emergency evacuation module,large-scale event management module,user management module and users display module.At the same time,through unit testing and integration testing of the system,and designing multiple test cases for each module function,the correctness and practicability of the system functions are finally verified,and the functional requirements in the design goals are met.