INTERSTATE 5
INTERSTATE 5 in 07-La-005-28.14-Gndl, Los Angeles County, California received a condition grade of B (68/100). Built in 1957, the bridge carries 239K vehicles daily on INTERSTATE 5 over Allen Avenue.
INTERSTATE 5 carries a B on the BridgeSafety Condition Score with 68/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1957 and is now 69 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. INTERSTATE 5 carries an average daily traffic count of 239,010 vehicles, with 10 lane(s) crossing Allen Avenue. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
INTERSTATE 5 is a 69-year-old bridge located 07-La-005-28.14-Gndl in Los Angeles County, California. The bridge carries INTERSTATE 5 over Allen Avenue with 10 traffic lanes, handling approximately 239K vehicles per day. Built in 1957 and reconstructed in 2014, the structure spans 19.7 meters.
The bridge received a Condition Grade of B (68/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 8/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 5 has a Condition Score of 68/100 (Grade B). Its deck is rated 6/9, superstructure 8/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 5 was built in 1957 and reconstructed in 2014, making it 69 years old. The average bridge age in the United States is 48 years.
INTERSTATE 5 carries approximately 239K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 19.7 meters long and located on INTERSTATE 5 in 07-La-005-28.14-Gndl, Los Angeles County, California.
No, INTERSTATE 5 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
INTERSTATE 5 is located 07-La-005-28.14-Gndl in Los Angeles County, California. The bridge carries INTERSTATE 5 over Allen Avenue. Its coordinates are 34.167572, -118.300147. It is maintained by State Highway Agency.
INTERSTATE 5 carries INTERSTATE 5 over Allen Avenue. The bridge is 19.7 meters long and was built in 1957, with reconstruction in 2014.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.