Question

19-5 Traffic Engineering 5th edition Develop a signal timing for intersection: N/S 30 ft (1 lane NB/ 1 lane SB) E/W 85 ft ( 3 lanes EB/ 3 lanes WB...with separate left turn lane on EB and WB approach) Veh/hr EB: Left - 200, Through - 800, Right 120 WB: Left - 160, Through - 1050, right - 100 NB: Left - 10, Through - 420, right - 10 SB: Left - 12, Through 400, right - 8 PHF = .92 Level Terrain Target v/c ratio = .95 Moderate pedestrian activity Avg approach speeds : 30 mph N-S 40 mph E-W Crosswalk widths = 10 ft Crosswalk setback = 2 ft Vehicle deceleration (a) = 10 ft/s^2 Driver reaction time (t) = 1 s Pedestrian walking speed = 3.5 ft/s length of typical vehicle = 18 ft l1 = e = 2 s

Answer 1

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