A Data-Driven Approach to Estimate Incident-Induced Delays Using Incomplete Probe Vehicle Data: Application to Safety Service Patrol Program Evaluation

Table 4

The program delay savings.

Types (unit: veh-hour)	Passenger car				Truck
	Shoulder block		Lane(s) block		Shoulder block		Lane(s) block
	Before SSP	After SSP	Before SSP	After SSP	Before SSP	After SSP	Before SSP	After SSP
The number of cases	341	593	248	60	341	593	248	60
Sum of delay	7,519.36	3,534.03	6,751.59	804.20	2,028.00	647.81	1,777.25	274.32
Average delay	22.05	5.96	27.22	13.40	5.95	1.09	7.17	4.57
Average delay savings	16.09		13.82		4.86		2.60
Sum of delay saving	9,541.37		829.20		2,881.98		156.00
Annual delay savings	18,723.66		1,627.19		5,655.50		306.13
Total annual delay saving	20,305.85				5,961.63