S280-SAN Bruno Off over Interstate 380 (future)
GoodSan Mateo County, California · 04-SM-280-R20.98-SBR · Structure no. 35 0220K
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 222 ft
- 2 main spans
- Daily traffic
- 5,785
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
S280-SAN Bruno Off over Interstate 380 (future) is a prestressed concrete continuous box beam or girders - multiple carrying S280-SAN Bruno Off over Interstate 380 (future) 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 5,785 vehicles a day, roughly 2% of them trucks, projected to reach 7,268 by 2040. The structure is 222 ft (67.6 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 S280-SAN Bruno Off over Interstate 380 (future) built?
It was built in 1973, making it 52 years old in 2025.
What condition is S280-SAN Bruno Off over Interstate 380 (future) in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.
How much traffic does S280-SAN Bruno Off over Interstate 380 (future) carry?
About 5,785 vehicles per day (1998 count), of which roughly 2% are trucks.
How long is S280-SAN Bruno Off over Interstate 380 (future)?
The structure is 222 ft (67.6 m) long with a longest span of 112 ft (34.2 m) and a deck 28 ft wide.
Who owns S280-SAN Bruno Off over Interstate 380 (future)?
It is owned by the State Highway Agency.