Interstate 280 over San Tomas Expressway
FairSanta Clara County, California · 04-SCL-280-5.31-SJS · Structure no. 37 0194
- Built
- 1964
- 61 years old, rebuilt 1991
- Condition
- Fair
- inspected January 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 249 ft
- 3 main spans
- Daily traffic
- 203,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 280 over San Tomas Expressway is a concrete continuous box beam or girders - multiple carrying Interstate 280 over San Tomas Expressway in Santa Clara County, California. It was built in 1964 and reconstructed in 1991, so it is 61 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 6 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 203,000 vehicles a day, roughly 3% of them trucks, projected to reach 238,620 by 2046. The structure is 249 ft (76 m) long and 171 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 280 over San Tomas Expressway built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1991.
What condition is Interstate 280 over San Tomas Expressway 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 January 2024.
How much traffic does Interstate 280 over San Tomas Expressway carry?
About 203,000 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is Interstate 280 over San Tomas Expressway?
The structure is 249 ft (76 m) long with a longest span of 69 ft (21 m) and a deck 171 ft wide.
Who owns Interstate 280 over San Tomas Expressway?
It is owned by the State Highway Agency.