U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Definition: The Annual Average Daily Traffic (AADT) on the approach leg of the intersection/junction.
Attributes: Vehicles per day
Priority: Critical
HPMS/Tool Requirements: HSM/IHSDM (Required), SafetyAnalyst (Required Conditionally)
