Abstract: In order to promote the formulation and improvement of safety regulations of motorcoaches and improve its safety design level, an evacuation experiment with 45 passengers aged 20-68 was conducted in six scenarios. Firstly, evacuation movement data of passengers were collected with an on-vehicle video system and then macroscopic evacuation performances of motorcoaches in different scenarios were compared to obtain key factors that affect evacuation efficiency by using variance analysis. Finally, key movement parameters of passengers in aisles in front of stairs were collected, and velocity-density relationship was constructed. The results show that evacuation takes the longest time (i.e. 63 second) in a rear door opening scenario, and available exits, evacuation drill and door width have a significant influence on evacuation efficiency. Furthermore, average speeds of passengers on the front and rear stairs are (0.93±0.31)m/s and (0.90±0.31)m/s respectively. Velocity-density relationship curve is consistent with related researches in terms of values and trends.

Key words: motorcoach, evacuation characteristics, restrictive factors, evacuation time, movement parameters