Research And Simulation On Road Network Emergency Evacuation

City emergency evacuation based road network is when unexpected events happen in thecity, evacuate the thick public to safe areas through road network, to avoid or reduce thepersonnel casualties and property losses. The major of the evacuation route planning is tocalculate the optimum route planning strategy, follow which the whole time needed for allthe evacuees to arrive at the destinations is as short as possible.The key point of network emergency evacuation plans is solving the problem ofevacuation path planning.in this regard, there are a lot of researches, including Campos’sthe K-shortest path method, Dunn study the maximum flow method, linear programmingmethods and so on. The CCRP methods is more concerned about the feasibility algorithmin recent years. This paper focuses on the algorithm and application research, the mainwork is as follows:1） Improvement of the CCRP algorithm: First achieve CCRP algorithm, then based on theoriginal algorithm design an algorithm considering the dynamic personnel flow. In theactual situation the personnel in the region to be evacuated is not in all the source node towait for evacuation at the initial moment. In such cases, the addition of super-nodes makesthe personnel flow gradually into the source node, also can have convergence withbuilding evacuation with its staff output stream as the input data of the algorithm,whichmore fits the actual situation.2) Design of the simulation system, the user can manually enter the scene parameterdata,after calculation the process of evacuation can be demonstrated in real-time dynamicpresentation in the road network. and display the results of the algorithm in real-time.3) Analysis of simulation results: Use the Optics Valley region as an example scenario,after a lot of testing, the results were analyzed to obtain the following results andconclusions:①evacuation scenein different times with different people number anddistribution,so this article designs the corresponding evacuation plans for typical periods②The impact of the number of personnel on the evacuation time is analyzed, from safetypoint of view,gives maximum number of evacuation for specific situations.③for thisspecific scene of the Optics Valley, the typical period of more staff, the author doessensitivity analysis, and gives recommendations of the critical evacuation.path.