Evacuation Analysis and Optimization of Double-deck Bus

Traffic safety is the basis of urban security. In recent years, domestic and foreign scholars have made more research on the evacuation of ordinary buses and achieved satisfactory results, but the research results of double-deck bus evacuation are very limited. Taking a typical double-deck bus as the research object, Pyrosim is used to simulate the fire in the vehicle. According to the simulation results, the evacuation time is 85s when the flue gas height reaches the escape threshold of 1.5m, so the effective safe evacuation time is 85s. On this basis, the pathfinder is used to simulate the evacuation situation, and the optimization measures are put forward. The results show that the right front door width of the double-decked bus is 1.1m, the back door width is 1.7m, and the staircase width is 1.1m. Compared with the original design (right front door 0.8m, back door 1.5m, stairs 0.9m) shorten the evacuation time 36s, to achieve safe evacuation requirements.