Analysis of Work-Zone Crashes Using the Ordered Probit Model with Factor Analysis in Egypt

Table 7

The weight of each influential factor.

Common factor	Weight of the common factor; Ai	Factor	Absolute value	The weight of factor on corresponding common factor; (normalization) Ak	Weight of factor WK
	0.333	Number of lane closures	0.29	0.262	0.087
		Type of surface construction	0.279	0.252	0.084
Advanced work-zone information		Road Character	0.274	0.247	0.082
		Road class	0.265	0.239	0.080
	0.238	Day of week	0.399	0.346	0.082
Visibility and traffic condition		Month	0.381	0.330	0.078
		Time	0.373	0.324	0.077
	0.162	Crash type	0.587	0.420	0.068
Crash characteristic		Number of the vehicles	0.348	0.249	0.040
		Vehicle type	0.461	0.330	0.053
	0.152	Gender	0.6	0.526	0.080
Driver skills		Age	0.541	0.474	0.072
Weather condition	0.116	Weather condition	0.845	1.000	0.116
Total	1			5	1