Traffic Incident Clearance Time and Arrival Time Prediction Based on Hazard Models

Table 4

Estimation results of survival AFT model for clearance time for crash.

Variable	Estimate coefficient	Wald Chi-square	Pr > ChiSq
Intercept	4.7907	8.74	0.0031
Priority	−0.1495	27.7239	<0.0001
Intersection	0.1737	5.3656	0.0205
Blockage type	0.1878	13.7469	0.0081
Weather	0.1103	15.1529	0.0341
Total opp lanes block	0.0753	11.5657	0.0412
Traffic disrupted	0.0628	4.6412	0.0312
Heavy traffic	0.1356	10.4797	0.0012
Major incident	0.2158	17.7047	<0.0001
Diversion required	0.2775	33.0936	<0.0001
Towing required	−0.1518	49.2159	<0.0001
Number of vehicles involved	0.2862	70.2871	<0.0001
Number of people injured	0.7411	26.1993	0.0101
Number of fatalities	1.0412	30.9592	<0.0001
Chemical spill	0.3045	17.4566	<0.0001
Log likelihood	−5509.6196