Analysis Model of Risk Factors of Urban Bus Operation Based on FTA-CLR

Table 1

Importance coefficient of risk factors of urban bus operation accidents.

Risk factors	Structural importance coefficient	Probability importance coefficient	Critical importance coefficient
Age X1	1	0.0115	0.0028
Driving experience X2	1.5	0.0386	0.0257
Gender X3	1	0.0093	0.0005
Weather X4	1.125	0.0113	0.0020
Road table conditions X5	1	0.0103	0.0015
Visibility X6	0.125	0.0007	0.0004
Terrain X7	0.125	0.0007	0.0002
Lighting conditions X8	1	0.0093	0.0005
Traffic signal mode X9	0.5	0.0091	0.0034
Roadside facilities protection type X10	1.5	0.0168	0.0127
Road physical isolation X11	0.5	0.0010	0.0007
Road condition X12	1	0.0091	0.0003
Driving state X13	1	0.0441	0.0357
Intersection or section X14	1	0.0106	0.0018
Driving period X15	0.5	0.0051	0.0007
Road alignment X16	0.125	0.0007	0.0001