Practice Question: Average Annual Daily Traffic for Roadway

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Solution

Given:

\(V_{24ij} = 18,000 \text{ vehicles (24-hour volume for a Wednesday in July)}\\\)

 

\(V_{avg} = 17,000 \text{ vehicles (average daily count for all days of the week in July)}\)

 

\(MF_j =1 \ (monthly \ adjustment\ factor \ for \ July)\)

 

First, calculate the Daily Adjustment Factor (\(DF_i\)):

\[DF_i = \frac{V_{avg}}{V_{day}}\\\]
\[DF_i = \frac{17,000}{18,000} \approx 0.9444\]

The AADT is calculated as:
\[AADT = V_{24ij} \times DF_i \times MF_j\\\]
\[AADT = 18,000 \times 0.9444 \times 1\\\]
\[AADT \approx 17,000\]

 

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