State Route 280 SB over Trousdale Drive
FairSan Mateo County, California · 04-SM-280-R17.16 · Structure no. 35 0215L
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 123 ft
- 1 main span
- Daily traffic
- 54,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 280 SB over Trousdale Drive is a prestressed concrete box beam or girders - multiple carrying State Route 280 SB over Trousdale Drive in San Mateo County, California. It was built in 1969, so it is 56 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 54,500 vehicles a day, projected to reach 73,656 by 2040. The structure is 123 ft (37.5 m) long and 70 ft wide.
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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 280 SB over Trousdale Drive built?
It was built in 1969, making it 56 years old in 2025.
What condition is State Route 280 SB over Trousdale Drive 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 July 2023.
How much traffic does State Route 280 SB over Trousdale Drive carry?
About 54,500 vehicles per day (2009 count).
How long is State Route 280 SB over Trousdale Drive?
The structure is 123 ft (37.5 m) long with a longest span of 121 ft (36.9 m) and a deck 70 ft wide.
Who owns State Route 280 SB over Trousdale Drive?
It is owned by the State Highway Agency.