Interstate 280 NB over State Route 92
FairSan Mateo County, California · 04-SM-280-10.81 · Structure no. 35 0243R
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 322 ft
- 2 main spans
- Daily traffic
- 52,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 280 NB over State Route 92 is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 280 NB over State Route 92 in San Mateo County, California. It was built in 1973, so it is 52 years old, younger 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 52,000 vehicles a day, roughly 3% of them trucks, projected to reach 80,137 by 2040. The structure is 322 ft (98 m) long and 82 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 280 NB over State Route 92 built?
It was built in 1973, making it 52 years old in 2025.
What condition is Interstate 280 NB over State Route 92 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 NB over State Route 92 carry?
About 52,000 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is Interstate 280 NB over State Route 92?
The structure is 322 ft (98 m) long with a longest span of 173 ft (52.6 m) and a deck 82 ft wide.
Who owns Interstate 280 NB over State Route 92?
It is owned by the State Highway Agency.