1. Estimate the optimal cycle length and green intervals for the intersection shown in the Figure below. Assume two phases A and B. Phase A serves the north-south traffic and phase B serves the east-west traffic. Lost time is 3sec/phase and Yellow+All-Red is4sec/phase. The width of each lane is 10 ft. Prevailing saturation flows are as follows:

S(T+R)=1700 (flow rate for through and right)

S(L) 300 (flow rate for left, which reflects a permitted operation)

Assume zero grade. No. of pedestrians crossing during an interval = 10. Crosswalk width(We) = 8ft. Pedestrian walking speed = 3.5ft/s.