In order to evaluate the operating conditions of vehicles at urban underground road entrances and exits and to investigate the influencing factors of their poor operating conditions, a three-stage DEA model of vehicle operating conditions evaluation method was proposed. The research results show that after stripping the environmental factors and random influence, the operation efficiency of urban underground road entrances and exits generally improves, and the environmental factors have significant influence on the operation efficiency of vehicles. Different environmental factors have different significant degree of influence on each urban underground road entrance and exit. In addition, the environmental factors that influence the operation condition of entrance and exit are different. The entrance should focus on the control of the distance between the hole and the confluence nose end, the length of the interweaving area, the lane, and the slope, while the safety factors at the exit should be taken into account.

Traffic engineering,;underground road,;Three-stage DEA model,;entrance and exit,;operation status