San Bruno Avenue over U.S. Highway 101
FairSan Mateo County, California · 04-SM-101-R20.39-SBR · Structure no. 35 0264
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 550 ft
- 4 main spans
- Daily traffic
- 30,659
- 2002 count
- Owner
- State
- State Highway Agency
About this bridge
San Bruno Avenue over U.S. Highway 101 is a concrete continuous box beam or girders - multiple carrying San Bruno Avenue over U.S. Highway 101 in San Mateo County, California. It was built in 1976, so it is 49 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 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 30,659 vehicles a day, roughly 5% of them trucks, projected to reach 37,632 by 2040. The structure is 550 ft (167.6 m) long and 94 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was San Bruno Avenue over U.S. Highway 101 built?
It was built in 1976, making it 49 years old in 2025.
What condition is San Bruno Avenue over U.S. Highway 101 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 April 2023.
How much traffic does San Bruno Avenue over U.S. Highway 101 carry?
About 30,659 vehicles per day (2002 count), of which roughly 5% are trucks.
How long is San Bruno Avenue over U.S. Highway 101?
The structure is 550 ft (167.6 m) long with a longest span of 127 ft (38.6 m) and a deck 94 ft wide.
Who owns San Bruno Avenue over U.S. Highway 101?
It is owned by the State Highway Agency.