Calculate the critical volume for the intersection using the data provided below.

Then estimate the green time interval for each phase of the intersection, also

using the data provided below. Assume that the intersection will operate as a

simple two$-$phase cycle with a $140$ second cycle length. Please also assume $4$

lanes per intersection approach $(2$ lanes in each direction$).$

Yellow $+$ all$-$red is $5\mathrm{.}5$ seconds $/$ phase

Northbound peak hour volume is $650$ vph

Southbound peak hour volume is $550$ vph

Westbound peak hour volume is $430$ kph

Eastbound peak hour volume is $970$ vph