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Civil Engineering Practice • Transportation Engineering

Traffic Flow & Capacity

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Worked

  • v_f = 60 mph, k_j = 200 veh/mi/lane: q_max = 60 × 200/4 = 3,000 veh/h/lane at 30 mph.
  • An hourly volume of 1,800 veh with a peak 15-minute count of 540: PHF = 1,800/(4 × 540) = 0.83. Design flow = V/PHF = 2,170 veh/h.

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