Traffic Incident Clearance Time Prediction and Influencing Factor Analysis Using Extreme Gradient Boosting Model

Table 1

Description of explanatory variables for clearance time.

Category	Variable	Value set
	Response time	R+
Incident	Incident type	0 = others
		1 = disabled
		2 = debris
		3 = abandoned vehicle
		4 = collision
	Lane closure type	0 = others
		1 = single lane
		2 = multiple lane
		3 = all travel lane
		4 = total lane
	Injury involved	0 = no; 1 = yes
	Fire involved	0 = no; 1 = yes
	Work zone involved	0 = no; 1 = yes
	Heavy truck involved	0 = no; 1 = yes
Temporal	Time of day	0 = daytime; 1 = night (22 : 00–6 : 00)
	Day of week	0 = weekdays; 1 = weekends
	Month of year	0 = other seasons
		1 = summer (Jun, Jul, and Aug)
		2 = winter (Dec, Jan, and Feb)
Geographic	HOV	0 = no; 1 = yes
Environment	Weather	0 = others
		1 = rainy
		2 = snowy
Traffic	Peak hours (6 : 00–9 : 00, 15 : 00–18 : 00)	0 = no; 1 = yes
	AADT	R+
Operational	Traffic control	0 = no; 1 = yes
	Washington State Patrol (WSP) involved	0 = no; 1 = yes