Calculate the critical volume then estimate the green time interval for each phase of the intersection using the data provided below. Assume that the intersection will operate as a simple two phase cycle with a 90 second cycle length. Please also assume 2 lanes per intersection approach.
Yellow + all-red is 4.5 seconds / phase
Northbound peak hour volume is 460 vph
Southbound peak hour volume is 700 vph
Westbound peak hour volume is 760 vph
Eastbound peak hour volume is 860 vph