Annual Average Daily Traffic (AADT) is defined as:
Choose the correct answer
Traffic count on a single peak-hour day
Total annual traffic in both directions divided by 365 — the key design input
Traffic count during monsoon only
One-way traffic on design lane
Correct Answer
B. Total annual traffic in both directions divided by 365 — the key design input
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AADT = total annual traffic volume in both directions / 365 days. It is the key parameter for pavement design (cumulative standard axles = AADT × growth factor × vehicle damage factor × design life). Design traffic in Million Standard Axles (MSA) = AADT × 0.365 × (growth factor) × (VDF) × lane distribution.
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