US 101
US 101 in 07-La-101-0.08-La, Los Angeles County, California received a condition grade of B (62/100). Built in 1944, the bridge carries 137K vehicles daily on US 101 over L A Ri RR Center Mission.
US 101 carries a B on the BridgeSafety Condition Score with 62/100. 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 1944, making it 82 years old — well beyond the typical 50-year design life of bridges constructed in that era. Bridges of this vintage usually need substantial rehabilitation or replacement once their original components have aged out, regardless of current condition ratings. US 101 carries an average daily traffic count of 137,000 vehicles, with 10 lane(s) crossing L A Ri RR Center Mission. 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
US 101 is a 82-year-old bridge located 07-La-101-0.08-La in Los Angeles County, California. The bridge carries US 101 over L A Ri RR Center Mission with 10 traffic lanes, handling approximately 137K vehicles per day. Built in 1944 and reconstructed in 1955, the structure spans 503.2 meters.
The bridge received a Condition Grade of B (62/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
US 101 has a Condition Score of 62/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
US 101 was built in 1944 and reconstructed in 1955, making it 82 years old. The average bridge age in the United States is 48 years.
US 101 carries approximately 137K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 503.2 meters long and located on US 101 in 07-La-101-0.08-La, Los Angeles County, California.
No, US 101 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
US 101 is located 07-La-101-0.08-La in Los Angeles County, California. The bridge carries US 101 over L A Ri RR Center Mission. Its coordinates are 34.053028, -118.225436. It is maintained by State Highway Agency.
US 101 carries US 101 over L A Ri RR Center Mission. The bridge is 503.2 meters long and was built in 1944, with reconstruction in 1955.
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.