I 280 S Au Line over 280/101 Interchange
PoorSan Francisco County, California · 04-SF-280-R4.18L-SF · Structure no. 34 0131L
- Built
- 1960
- 65 years old, rebuilt 1966
- Condition
- Poor
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 1,155 ft
- 13 main spans
- Daily traffic
- 80,000
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
I 280 S Au Line over 280/101 Interchange is a concrete continuous box beam or girders - multiple carrying I 280 S Au Line over 280/101 Interchange in San Francisco County, California. It was built in 1960 and reconstructed in 1966, so it is 65 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 80,000 vehicles a day, roughly 3% of them trucks, projected to reach 107,238 by 2041. The structure is 1,155 ft (352 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, 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 I 280 S Au Line over 280/101 Interchange built?
It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1966.
What condition is I 280 S Au Line over 280/101 Interchange in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.
How much traffic does I 280 S Au Line over 280/101 Interchange carry?
About 80,000 vehicles per day (2018 count), of which roughly 3% are trucks.
How long is I 280 S Au Line over 280/101 Interchange?
The structure is 1,155 ft (352 m) long with a longest span of 96 ft (29.3 m) and a deck 37 ft wide.
Who owns I 280 S Au Line over 280/101 Interchange?
It is owned by the State Highway Agency.