Question

All the vehicles that come during a particular peak hour come during a 10-minute period within this hour. The 15-minute peak hour factor for this peak hour is

• A. 0.25
• B. 0.167
• C. 0.75
• D. 1.0

Hint:

In peak hour calculations, always pay attention to the time intervals for which traffic data is provided to ensure accurate peak hour factor computation.

Answer 1

The Correct Option is A

The peak hour factor (PHF) is given by the formula: \[ {PHF} = \frac{q}{4 \times q_{15}}, \] where \( q \) is the total number of vehicles during the peak hour and \( q_{15} \) is the number of vehicles during the 15-minute peak period. In this case, we are told that all vehicles are passing in 10-minute intervals, so we have: \[ q = q_{15}. \] Therefore, \[ {PHF} = \frac{q_{15}}{4 \times q_{15}} = \frac{1}{4} = 0.25. \] Thus, the correct answer is option (A).