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GATE 2018 CE (CE2) – Question 26

Traffic Engineering and Transportation Planning · Traffic studies: flow, speed, peak hour factor, accident study · 1 mark · Multiple choice

Peak Hour Factor represents the proportion of peak subhourly flow within the peak hour. For 15-minute subhours, its theoretically possible range is ______.

  1. 0 to 1.0
  2. 0.25 to 0.75
  3. 0.25 to 1.0
  4. 0.5 to 1.0

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Correct answer: (C) 0.25 to 1.0

Explanation

For four quarter-hours, $\mathrm{PHF}=V/(4V_{15,\max})$. Concentrating all nonzero traffic in one quarter gives 0.25; distributing it equally gives 1. These are the theoretical bounds (C).