Analysis of Nonsevere Crashes on Two- and Four-Lane Urban and Rural Highways: Effects of Wet Pavement Surface Condition

Table 6

Descriptive statistics of the nonsevere aggregate crash rates across the categorical variables and tests of normality for the ten selected routes.

Variable		N	Mean	St. Dv.	Skewness	Kurtosis	Sig.
Surface Cond.	Dry	1032	262	273	1.293	1.126	0.001
	Wet	1066	54	71	1.455	1.462	0.001
Rural/Urban	Rural	1022	133	180	2.326	7.048	0.001
	Urban	1072	179	256	1.890	3.024	0.001
No. of Lanes	Two	1084	167	235	2.088	4.193	0.001
	Four	1010	145	210	2.210	5.466	0.001
Lighting	Dark	683	137	196	2.281	5.816	0.001
	Light	1411	166	235	2.071	4.238	0.001
Weather	Rain	864	55	74	1.613	2.459	0.001
	No Rain	1230	228	262	1.509	1.829	0.001