19-4. Develop a signal timing for the intersection shown below. Level terrain Driver reaction time (t) = 1.0 5 Vehicle deceleration rate (a) = 10 "/52 Length of typical vehicle = 18ft PHF = 0.90 Target v/c = 0.95 Low pedestrian activity Average approach speeds: 35 mi/h WB 40 mi/h NB Crosswalk widths = 10 ft Crosswalk setback = 2 ft Walking speed = 4.0 ftfs NB grade = 3% WE grade = — l % {'1 = e = 2.0 S