U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Definition: The unique numeric identifer assigned to the interchange that this ramp is part of. See Element 178. Unique Interchange Identifier above. This provides linkage to the basic interchange information and to all other ramps.
Attributes: The interchange identifier entered in Element 178. Unique Interchange Identifier.
HPMS/Tool Requirements: None