Traffic Signal Timing Calculator
Inputs
veh/hr
veh/hr/lane
HCM 6th Ed: base s₀=1,900 pc/h/ln; adjusted for width, turns, heavy vehicles; typical 1,700–1,900 vph
sec
sec
sec
MUTCD/HCM: urban 60–90 sec; major arterials 90–120 sec; Webster optimum typical 70–100 sec
Tab to move between fields
Results
Green Time per Phase
39 sec
Volume/Capacity (v/c)
0.98
Effective Green41 sec
Delay per Vehicle24 sec
Approach Capacity820 veh/hr
Total Lost Time12 sec
1
Identify Input Parameters
4 parameters
= Approach Volume = 800, Saturation Flow Rate = 1800, Yellow Time = 4, All-Red Interval = 2
= 6 input(s) provided
2
Calculate Green Time per Phase
Green Time per Phase
= 39
= 39
3
Calculate Volume/Capacity
Volume/Capacity
= 0.976
= 0.976
4
Calculate Effective Green
Effective Green
= 41
= 41
5
Calculate Delay per Vehicle
Delay per Vehicle
= 24
= 24