NB and SB RTE 280 over Lyell Street
PoorSan Francisco County, California · 04-SF-280-R2.91-SF · Structure no. 34 0089
- Built
- 1964
- 61 years old, rebuilt 1972
- Condition
- Poor
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 179 ft
- 3 main spans
- Daily traffic
- 170,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
NB and SB RTE 280 over Lyell Street is a concrete continuous box beam or girders - multiple carrying NB and SB RTE 280 over Lyell Street in San Francisco County, California. It was built in 1964 and reconstructed in 1972, so it is 61 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 170,000 vehicles a day, roughly 1% of them trucks, projected to reach 228,300 by 2044. The structure is 179 ft (54.7 m) long and 144 ft wide. If it were closed, the detour would be 1.9 mi (3 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 NB and SB RTE 280 over Lyell Street built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1972.
What condition is NB and SB RTE 280 over Lyell Street 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 April 2024.
How much traffic does NB and SB RTE 280 over Lyell Street carry?
About 170,000 vehicles per day (2019 count), of which roughly 1% are trucks.
How long is NB and SB RTE 280 over Lyell Street?
The structure is 179 ft (54.7 m) long with a longest span of 81 ft (24.7 m) and a deck 144 ft wide.
Who owns NB and SB RTE 280 over Lyell Street?
It is owned by the State Highway Agency.