The Selection Of Rescue Routes For Urban Roadtraffic Accidents Based On The GIS Technology

With the social and urban economic development in China, the threat to people's life and property caused by road traffic accidents is becoming increasingly severe. However, in our country, rescue measures for traffic accidents taken by relevant departments are relatively weak and rescue efficiency in dealing with such accidents is comparatively low because of such problems as unclear classification of accidents, irrational. processes of organization, backward technology and facilities and so on.The establishment and improvement of rescue system for road traffic accidents are the government's important task vital not only to the fulfillment of its functions of improving social administration and public services, but to the construction of a harmonious society. Compared with traditional methods, the increasingly matured GIS technology has unparalleled advantages in the study of accident rescue and other related issues.By taking into consideration the peculiarity of the choice of rescue routes for urban road traffic accidents, based on the Dijkstra algorithm to calculate the shortest path and combined with GIS technology, this paper proposes the Radius-Coverage Algorithm(RCA) to identify the best route and candidate of rescuing team. This Algorithm aims at locating the most effective rescuing route shortly after an accident and greatly reducing the loss incurred by the accident.This paper elaborates how to use RCA when accidents happen:taking different rescue approaches accordingly after classification of accident is determined at the first place; making a judgment of current traffic status based on traffic information derived and collected from real-time sample data of taxis running on street within GIS; applying RCA in finding the best rescue route while still taking reference from the conventional shortest-path algorithm; while managing complicated traffic data, building a road accident rescuing system by taking GIS as a platform combining with both VC++ language and RCA; examining the validation of RCA in case of spontaneous burning of a bus.