Interstate 405 over Slauson Ave
FairLos Angeles County, California · 07-LA-405-26.08-CLC · Structure no. 53 1401
- Built
- 1960
- 65 years old, rebuilt 2009
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 139 ft
- 2 main spans
- Daily traffic
- 274,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 405 over Slauson Ave is a concrete continuous box beam or girders - multiple carrying Interstate 405 over Slauson Ave in Los Angeles County, California. It was built in 1960 and reconstructed in 2009, 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 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 274,000 vehicles a day, roughly 4% of them trucks, projected to reach 345,557 by 2045. The structure is 139 ft (42.4 m) long and 165 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Interstate 405 over Slauson Ave built?
It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.
What condition is Interstate 405 over Slauson Ave 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 Interstate 405 over Slauson Ave carry?
About 274,000 vehicles per day (2019 count), of which roughly 4% are trucks.
How long is Interstate 405 over Slauson Ave?
The structure is 139 ft (42.4 m) long with a longest span of 67 ft (20.4 m) and a deck 165 ft wide.
Who owns Interstate 405 over Slauson Ave?
It is owned by the State Highway Agency.