Practice Question: Peak Hour Factor for a Freeway Segment

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Solution

Answer: B) 0.98

 

The peak hour factor (PHF) is based on the highest volume of vehicles passing over an hour and the highest volume over a 15-minute interval.

The 7:30-8:30 hour has the largest total volume of vehicles:

\[V\ =\ 825\ +\ 847+855+819=3346\]

Maximum Volume in a 15 Minute Period (8:00-8:15):
\[V_{15}=855\]
Peak Hour Factor:
\[PHF\ =\frac{V}{4 *V_{15}}=\frac{3346}{4*855}=0.98\]
 

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