A two-lane approach to a suburban intersection is located on level ground. There are no left-turns or special turning phases. Twenty percent of the vehicles turn right. Yielding the right of way to the moderate pedestrian traffic on the cross street. With 10.5 ft lanes, no buses and only 10% heavy vehicles, parking is allowed because parked vehicles do not encroach on the moving lanes and parking movements are infrequent.

(a) Determine the saturation flow rate according to the 2010 HCM, and the minimum proportion of time that the cycle should be effectively green if the approach flow is 1170 vph.