Fuzzy Reliability Calculation Method of Highway Alignment

Table 4

Calculation of the probability of failure of superelevation.

Superelevation value (%)	China		United States
	Radius of circular curve (m)	Probability of failure (%)	Radius of circular curve (m)	Probability of failure (%)
4	810	0.2546	—	—
6	710	0.2173	756	0.0337
8	650	0.086	667	0.0348
10	570	0.1632	597	0.0356
12	—	—	540	0.0373

Note: “—” indicates that the relevant data are not given in the specification.