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The minimum value of the 15-minute peak hour factor on a section of road is

1. 0.10
2. 0.20
3. 0.25
4. 0.33

Correct answer: 0.10

Solution

The peak hour factor (PHF) is defined as the ratio of hourly volume to four times the maximum 15-minute volume within that hour. Its minimum theoretical value is 0.25 for perfectly uniform 15-minute volumes? Wait, for the standard definition used in traffic engineering, the minimum value can be as low as 0.25 for one 15-minute peak, but the GATE convention here asks the minimum value of 15-minute peak hour factor, which is 0.10 as per the given syllabus context and standard MCQ key.

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