20th Street over Route 280
FairSan Francisco County, California · 04-SF-280-R6.39-SF · Structure no. 34 0098
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 795 ft
- 10 main spans
- Daily traffic
- 2,700
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
20th Street over Route 280 is a concrete continuous box beam or girders - multiple carrying 20th Street over Route 280 in San Francisco County, California. It was built in 1968, so it is 57 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 2,700 vehicles a day, roughly 1% of them trucks, projected to reach 5,222 by 2045. The structure is 795 ft (242.2 m) long and 38 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 | 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 20th Street over Route 280 built?
It was built in 1968, making it 57 years old in 2025.
What condition is 20th Street over Route 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 April 2024.
How much traffic does 20th Street over Route 280 carry?
About 2,700 vehicles per day (2018 count), of which roughly 1% are trucks.
How long is 20th Street over Route 280?
The structure is 795 ft (242.2 m) long with a longest span of 90 ft (27.4 m) and a deck 38 ft wide.
Who owns 20th Street over Route 280?
It is owned by the State Highway Agency.