The Research on Delay Propagation of Urban Rail Transit Operation under Sudden Failure

Table 1

Operation delay of urban rail transit.

Main category	Subcategory	Frequency (times/year)	Average processing time (min)	Proportion (%)
Train factors	Train failure, door, auxiliary control circuit, control circuit, brake, main circuit	127	17.6	30.75
Communication signal factor	ATS, vehicle ATC, trackside equipment, communication, signal, etc.	184	18.2	44.55
Power supply factors	Substation, touch network, power supply, etc.	8	23.4	1.94
Public works factors	Turnouts, lines	22	7.6	5.33
Passenger transportation factors	Screen door/safety door, driver delay, passenger transportation, and others	14	14.3	3.39
Objective factors	Passengers, people and objects, intrusion limits, large passenger flow, personnel invasion, human-train conflict, objectives, and others	58	3.3	14.04