Minimizing the Average Delay at Intersections via Presignals and Speed Control

Table 1

Assumptions for parameters used in the model.

Parameters	Values (current situation)	Values (after implementing the model)
Duration	1 h	1 h
Number of buses	12	12
Number of cars ()	800 veh	800 veh
Bus headway	300 s	300 s
Car headway	4.5 s	4.5 s
Cycle length ()	60 s	60 s
Red duration ()	30 s	30 s
Capacity ()	800 veh/h	800 veh/h
Jam density ()	100 veh/km	100 veh/km
Initial speed of bus ()	20 km/h	20 km/h
Initial speed of car ()	40 km/h	40 km/h
Green duration ()	30 s	30 s
Time for bus to change lane	15 s	15 s
Time for bus to reach the stop line	15 s	15 s
Capacity/density	8	8
	83.33 m	83.33 m
Distance of VMS for car ()	- -	22.22 m
Reaction time (t)	2 s	2 s
	- -	106 m
Bus travel time ()	15 s	15 s
Suggested travel time of bus ()	30 s	30 s
Car travel time ()	- -	9.5 s
Suggested travel time of car ()	- -	39.5 s
Suggested speed of car ()	- -	9.62 km/h
Traffic flow ()	800 veh/h	800 veh/h
()	1.00	1.00
Initial queue ()	10 veh	0 veh
Uniform delay ()	15 s	15 s
Incremental delay ()	64 s	64 s
Progression adjustment factor (PF)	1.667	1.667
Initial queue delay ()	22.5 s	0 s
Delay	111.14 s	88.64 s
Travel time bus	126.14 s	103.64 s
Travel time car	150.64 s	128.14 s
	0.5	0.5
Average car occupancy	2 p	2 p
Delay/person	55.57 s/pp	44.32 s/pp