NB AND SB RTE 280
NB AND SB RTE 280 in 04-Sf-280-R2.91-Sf, San Francisco County, California received a condition grade of B (61/100). Built in 1964, the bridge carries 170K vehicles daily on NB AND SB RTE 280 over Lyell Street. It is classified as structurally deficient.
NB AND SB RTE 280 carries a B on the BridgeSafety Condition Score with 61/100. 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 1964 and is now 62 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. NB AND SB RTE 280 carries an average daily traffic count of 170,000 vehicles, with 9 lane(s) crossing Lyell Street. 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
NB AND SB RTE 280 is a 62-year-old bridge located 04-Sf-280-R2.91-Sf in San Francisco County, California. The bridge carries NB AND SB RTE 280 over Lyell Street with 9 traffic lanes, handling approximately 170K vehicles per day. Built in 1964 and reconstructed in 1972, the structure spans 54.7 meters.
The bridge received a Condition Grade of B (61/100) based on Federal Highway Administration inspection data. Its deck is rated 4/9 (poor), superstructure 7/9 (good), and substructure 7/9 (good). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
NB AND SB RTE 280 has a Condition Score of 61/100 (Grade B). Its deck is rated 4/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is classified as structurally deficient.
NB AND SB RTE 280 was built in 1964 and reconstructed in 1972, making it 62 years old. The average bridge age in the United States is 48 years.
NB AND SB RTE 280 carries approximately 170K vehicles per day (average daily traffic). The bridge has 9 traffic lanes. It is 54.7 meters long and located on NB AND SB RTE 280 in 04-Sf-280-R2.91-Sf, San Francisco County, California.
Yes, NB AND SB RTE 280 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
NB AND SB RTE 280 is located 04-Sf-280-R2.91-Sf in San Francisco County, California. The bridge carries NB AND SB RTE 280 over Lyell Street. Its coordinates are 37.731969, -122.432092. It is maintained by State Highway Agency.
NB AND SB RTE 280 carries NB AND SB RTE 280 over Lyell Street. The bridge is 54.7 meters long and was built in 1964, with reconstruction in 1972.
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.