INTERSTATE 280
INTERSTATE 280 in 04-Scl-280-11.45-Lats, Santa Clara County, California received a condition grade of B (70/100). Built in 1967, the bridge carries 138K vehicles daily on INTERSTATE 280 over Foothill Expressway.
INTERSTATE 280 carries a B on the BridgeSafety Condition Score with 70/100. 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 1967 and is now 59 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 280 carries an average daily traffic count of 138,000 vehicles, with 10 lane(s) crossing Foothill Expressway. 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 280 is a 59-year-old bridge located 04-Scl-280-11.45-Lats in Santa Clara County, California. The bridge carries INTERSTATE 280 over Foothill Expressway with 10 traffic lanes, handling approximately 138K vehicles per day. Built in 1967 and reconstructed in 1991, the structure spans 51.7 meters.
The bridge received a Condition Grade of B (70/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 280 has a Condition Score of 70/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 280 was built in 1967 and reconstructed in 1991, making it 59 years old. The average bridge age in the United States is 48 years.
INTERSTATE 280 carries approximately 138K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 51.7 meters long and located on INTERSTATE 280 in 04-Scl-280-11.45-Lats, Santa Clara County, California.
No, INTERSTATE 280 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 280 is located 04-Scl-280-11.45-Lats in Santa Clara County, California. The bridge carries INTERSTATE 280 over Foothill Expressway. Its coordinates are 37.334639, -122.068056. It is maintained by State Highway Agency.
INTERSTATE 280 carries INTERSTATE 280 over Foothill Expressway. The bridge is 51.7 meters long and was built in 1967, with reconstruction in 1991.
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.