State Route 280 SB over Hayne Road
FairSan Mateo County, California · 04-SM-280-R14.22-HIL · Structure no. 35 0210L
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 108 ft
- 1 main span
- Daily traffic
- 53,500
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 280 SB over Hayne Road is a prestressed concrete box beam or girders - multiple carrying State Route 280 SB over Hayne Road 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 53,500 vehicles a day, roughly 3% of them trucks, projected to reach 80,137 by 2040. The structure is 108 ft (32.9 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 | 7 Good | Some minor problems. |
| 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 State Route 280 SB over Hayne Road built?
It was built in 1969, making it 56 years old in 2025.
What condition is State Route 280 SB over Hayne Road 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 Hayne Road carry?
About 53,500 vehicles per day (1998 count), of which roughly 3% are trucks.
How long is State Route 280 SB over Hayne Road?
The structure is 108 ft (32.9 m) long with a longest span of 106 ft (32.2 m) and a deck 70 ft wide.
Who owns State Route 280 SB over Hayne Road?
It is owned by the State Highway Agency.