Prioritization of Bridges to Improve Emergency Road Network Performance after the Earthquake

Table 11

Sampling method.

Type of cumulative failure method	Sampling approach	Number of samples	Sample’s percentage	% cumulative occurrence probability	% error (distance from the total length optimal value)
The number of usable bridges	One usable and less	6	19	11.52	2.20
	Two usable and less	16	50	38.60	1.63
	Three usable and less	26	81	73.48	0.36
	Four usable and less	31	97	94.96	0.08
	Five usable and less	32	100	100.00	0.00
The probability of occurrence	“Very high” occurrence	2	6	15.12	0.60
	“High” to “very high” occurrence	8	25	45.36	0.60
	“Medium” to “very high” occurrence	16	50	72.00	0.60
	“Low” to “very high” occurrence	24	75	89.44	0.48
	“Very low” to “very high” occurrence (all)	32	100	100.00	0.00