Interstate 405 over Imperial Highway
GoodLos Angeles County, California · 07-LA-405-R21.22-LA · Structure no. 53 1241
- Built
- 1963
- 62 years old, rebuilt 1994
- Condition
- Good
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 158 ft
- 3 main spans
- Daily traffic
- 272,600
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 405 over Imperial Highway is a concrete continuous box beam or girders - multiple carrying Interstate 405 over Imperial Highway in Los Angeles County, California. It was built in 1963 and reconstructed in 1994, so it is 62 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 272,600 vehicles a day, roughly 5% of them trucks, projected to reach 302,023 by 2041. The structure is 158 ft (48.2 m) long and 173 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Imperial Highway built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1994.
What condition is Interstate 405 over Imperial Highway in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.
How much traffic does Interstate 405 over Imperial Highway carry?
About 272,600 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is Interstate 405 over Imperial Highway?
The structure is 158 ft (48.2 m) long with a longest span of 101 ft (30.8 m) and a deck 173 ft wide.
Who owns Interstate 405 over Imperial Highway?
It is owned by the State Highway Agency.