Interstate 405 over Carson Street
FairLos Angeles County, California · 07-LA-405-10.54-CRSN · Structure no. 53 1171
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 210 ft
- 4 main spans
- Daily traffic
- 290,000
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 405 over Carson Street is a concrete continuous box beam or girders - multiple carrying Interstate 405 over Carson Street in Los Angeles County, California. It was built in 1961, so it is 64 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 6 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 290,000 vehicles a day, roughly 4% of them trucks, projected to reach 315,646 by 2046. The structure is 210 ft (64 m) long and 154 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 405 over Carson Street built?
It was built in 1961, making it 64 years old in 2025.
What condition is Interstate 405 over Carson Street 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 September 2024.
How much traffic does Interstate 405 over Carson Street carry?
About 290,000 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is Interstate 405 over Carson Street?
The structure is 210 ft (64 m) long with a longest span of 66 ft (20.1 m) and a deck 154 ft wide.
Who owns Interstate 405 over Carson Street?
It is owned by the State Highway Agency.