U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Definition: Unique segment identifier.
Attributes: Derived from other elements (e.g., combination of route number, county location and beginning and ending milepoints).
Priority: Critical
HPMS/Tool Requirements: HPMS (Full Extent), HSM/IHSDM (Required), SafetyAnalyst (Required)