John Daly Blvd over Interstate 280 SR 1
FairSan Mateo County, California · 04-SM-280-M27.17L-DLC · Structure no. 35 0172
- Built
- 1965
- 60 years old, rebuilt 2001
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 386 ft
- 4 main spans
- Daily traffic
- 29,660
- 2002 count
- Owner
- State
- State Highway Agency
About this bridge
John Daly Blvd over Interstate 280 SR 1 is a concrete continuous box beam or girders - multiple carrying John Daly Blvd over Interstate 280 SR 1 in San Mateo County, California. It was built in 1965 and reconstructed in 2001, 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 29,660 vehicles a day, roughly 2% of them trucks, projected to reach 39,753 by 2047. The structure is 386 ft (117.7 m) long and 114 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 John Daly Blvd over Interstate 280 SR 1 built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2001.
What condition is John Daly Blvd over Interstate 280 SR 1 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 John Daly Blvd over Interstate 280 SR 1 carry?
About 29,660 vehicles per day (2002 count), of which roughly 2% are trucks.
How long is John Daly Blvd over Interstate 280 SR 1?
The structure is 386 ft (117.7 m) long with a longest span of 110 ft (33.5 m) and a deck 114 ft wide.
Who owns John Daly Blvd over Interstate 280 SR 1?
It is owned by the State Highway Agency.