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

Table 3

Parameters estimates of arrival time probability density distribution fitness for each incident type.

Incident type	Parameters	Gamma	Log-logistic	Weibull	Lognormal
Arrival time for crash	Log likelihood	−18182.7	−18211	−18215.4	−18207.7
	Domain	0 < y < Inf	0 < y < Inf	0 < y < Inf	0 < y < Inf
	Mean	19.9232	25.3389	19.979	21.4866
	Variance	323.564	Inf	343.475	885.809
Arrival time for stationary vehicle	Log likelihood	−58947.1	−58415.1	−58769.5	−58097.4
	Domain	0 < y < Inf	0 < y < Inf	0 < y < Inf	1 < y < Inf
	Mean	21.8141	32.3138	21.5822	23.2076
	Variance	559.408	Inf	628.02	1895.03
Arrival time for hazard	Log likelihood	−17132.8	−17269.8	−17127.8	−17250
	Domain	0 < y < Inf	0 < y < Inf	0 < y < Inf	0 < y < Inf
	Mean	58.4637	102.204	58.4066	70.5117
	Variance	3728.08	Inf	3914.51	20842.2