Junipero Serra Blv over Interstate 280
FairSan Mateo County, California · 04-SM-280-R26.50-DLC · Structure no. 35 0184
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 330 ft
- 3 main spans
- Daily traffic
- 29,300
- 2002 count
- Owner
- State
- State Highway Agency
About this bridge
Junipero Serra Blv over Interstate 280 is a concrete continuous box beam or girders - multiple carrying Junipero Serra Blv over Interstate 280 in San Mateo County, California. It was built in 1965, so it is 60 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 29,300 vehicles a day, roughly 2% of them trucks, projected to reach 39,753 by 2047. The structure is 330 ft (100.6 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Junipero Serra Blv over Interstate 280 built?
It was built in 1965, making it 60 years old in 2025.
What condition is Junipero Serra Blv over Interstate 280 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 February 2025.
How much traffic does Junipero Serra Blv over Interstate 280 carry?
About 29,300 vehicles per day (2002 count), of which roughly 2% are trucks.
How long is Junipero Serra Blv over Interstate 280?
The structure is 330 ft (100.6 m) long with a longest span of 138 ft (42.1 m) and a deck 66 ft wide.
Who owns Junipero Serra Blv over Interstate 280?
It is owned by the State Highway Agency.