INTERSTATE 405
INTERSTATE 405 in 07-La-405-18.92-Haw, Los Angeles County, California received a condition grade of A (82/100). Built in 1963, the bridge carries 261K vehicles daily on INTERSTATE 405 over Bnsf Ry Spur.
INTERSTATE 405 carries an A on the BridgeSafety Condition Score with 82/100. Deck, superstructure, and substructure ratings all sit in the better tier of the FHWA NBI distribution. The bridge is structurally sound by federal standards.
The bridge was built in 1963 and is now 63 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 405 carries an average daily traffic count of 260,800 vehicles, with 11 lane(s) crossing Bnsf Ry Spur. 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 405 is a 63-year-old bridge located 07-La-405-18.92-Haw in Los Angeles County, California. The bridge carries INTERSTATE 405 over Bnsf Ry Spur with 11 traffic lanes, handling approximately 261K vehicles per day. Built in 1963, the structure spans 8.2 meters.
The bridge received a Condition Grade of A (82/100) based on Federal Highway Administration inspection data. Its deck is rated 8/9 (good), superstructure 8/9 (good), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 405 has a Condition Score of 82/100 (Grade A). Its deck is rated 8/9, superstructure 8/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 405 was built in 1963, making it 63 years old. The average bridge age in the United States is 48 years.
INTERSTATE 405 carries approximately 261K vehicles per day (average daily traffic). The bridge has 11 traffic lanes. It is 8.2 meters long and located on INTERSTATE 405 in 07-La-405-18.92-Haw, Los Angeles County, California.
No, INTERSTATE 405 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 405 is located 07-La-405-18.92-Haw in Los Angeles County, California. The bridge carries INTERSTATE 405 over Bnsf Ry Spur. Its coordinates are 33.897467, -118.369469. It is maintained by State Highway Agency.
INTERSTATE 405 carries INTERSTATE 405 over Bnsf Ry Spur. The bridge is 8.2 meters long and was built in 1963.
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.