Predicting Wet-Road Crashes Using the Finite-Mixture Zero-Truncated Negative Binomial Model

Table 1

Descriptive statistics of data (sample size: 395).

Variable	Mean	Minimum	Maximum	Standard deviation
Segment length (km)	1.483	0.172	3.080	0.969
Traffic volume (veh/day)	11569.41	3192	26935	5505.763
Lane width (m)	3.826	2.9	5.0	0.513
Average outside shoulder width (m)	2.515	0.61	3.05	0.758
Average inside shoulder width (m)	1.536	0	3.05	0.705
Median width (m)	6.352	3.05	14.64	3.107
Wet-road crash count	2.42	1	15	2.439