Traffic Signal Timing Calculator
Calculate signal green time, effective green, volume-to-capacity ratio, and average delay per vehicle for signalized intersections.
Inputs
veh/hr
veh/hr/lane
sec
sec
sec
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
How to Use This Calculator
- Enter approach volumes, saturation flow rates, and lost time per phase.
- Set number of phases and peak hour factor.
- Review cycle length, green time per phase, and level of service (v/c ratio).
- Target v/c ratios below 0.90 for acceptable intersection operation.
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