GATE CE 2022 Set 1 — Question 64
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Transportation Engineering → Traffic Studies & Flow → Peak Hour Factor
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Question
The vehicle count obtained in every 10 minute interval of a traffic volume survey done in peak one hour is given below.
The peak hour factor (PHF) for 10 minute sub-interval is __________.
(round off to one decimal place)
| Time Interval (in minutes) | Vehicle Count |
|---|---|
| 0 – 10 | 10 |
| 10 – 20 | 11 |
| 20 – 30 | 12 |
| 30 – 40 | 15 |
| 40 – 50 | 13 |
| 50 – 60 | 11 |
(round off to one decimal place)
Correct answer
0.8 to 0.8
Solution
The Peak Hour Factor (PHF) for a sub-interval of minutes is calculated as:Where:
= Total hourly volume
= Number of sub-intervals in an hour ()
= Maximum volume in any single sub-intervalFrom the given data:
Total volume vehicles/hour
Sub-interval duration minutes
Number of intervals
Maximum volume in a 10-minute interval Thus, the peak hour factor is 0.8.
= Total hourly volume
= Number of sub-intervals in an hour ()
= Maximum volume in any single sub-intervalFrom the given data:
Total volume vehicles/hour
Sub-interval duration minutes
Number of intervals
Maximum volume in a 10-minute interval Thus, the peak hour factor is 0.8.
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