Home › California › San Francisco County › I 280n-101n (re) over 280/101 Interchang

I 280n-101n (re) over 280/101 Interchange

San Francisco County, California · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

I 280n-101n (re) over 280/101 Interchange in San Francisco County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1960, making it 65 years old at the 2025 inventory.
It carries about 80,000 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
It is one of 76 of the 144 inventoried bridges in San Francisco County rated fair (52.8%); 20 (13.9%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous concrete multiple box beam
Length	about 1,855 ft
Location	04-sf-280-r4.16r-sf
NBI structure number	34 0134G
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.

Bridge	Built	Vehicles/day	Condition
Interstate 80 over Gate San Francisco Bay	2013	265,000	Good
St Rte 101 (5TH St over Bayshore Viaduct	1955	256,700	Fair
Interstate 80 over Yerba Buena Island	1936	248,000	Good
Interstate 80 over Yerba Buena Island	2007	248,000	Good
U.S. Highway 101 over 280/101 Ic - Alemany Cir	1950	234,000	Fair
U.S. Highway 101 over Cesar Chavez Blvd	1951	234,000	Poor