Interstate 280 over Stanford Linear Accel
FairSan Mateo County, California · 04-SM-280-R1.02 · Structure no. 35 0194
- Built
- 1965
- 60 years old, rebuilt 1969
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 272 ft
- 3 main spans
- Daily traffic
- 101,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 280 over Stanford Linear Accel is a steel continuous stringer/multi-beam or girder carrying Interstate 280 over Stanford Linear Accel in San Mateo County, California. It was built in 1965 and reconstructed in 1969, so it is 60 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 101,000 vehicles a day, roughly 3% of them trucks, projected to reach 146,745 by 2040. The structure is 272 ft (82.8 m) long and 151 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 280 over Stanford Linear Accel built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1969.
What condition is Interstate 280 over Stanford Linear Accel in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does Interstate 280 over Stanford Linear Accel carry?
About 101,000 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is Interstate 280 over Stanford Linear Accel?
The structure is 272 ft (82.8 m) long with a longest span of 113 ft (34.3 m) and a deck 151 ft wide.
Who owns Interstate 280 over Stanford Linear Accel?
It is owned by the State Highway Agency.