ABSTRACT
Signaling system is a typical safety critical system aiming to enhance the safety and efficiency of train operation. Any signaling failure or abnormity will force a fallback to the safe side (stop), causing the drop in driving efficiency. Therefore, a fast and efficient way to replace the metro system after signaling failure is of great significance for passengers. Considering the road traffic conditions, a method for generating emergency metro-bus bridging plan is presented to improve the metro system resilience by assessing the satisfied passenger travel demands. The plan is implemented by generating the bus bridging routes based on the constructed metro-bus network and allocating the limited bus resources to the generated routes optimally. The approach is applied to Beijing Metro Line 5 coping with high signaling failure probability and the simulation results show that the system resilience is significantly enhanced about 21%–43% with metro-bus bridging service.
