Interstate 405 over National Blvd
GoodLos Angeles County, California · 07-LA-405-29.16-LA · Structure no. 53 0703
- Built
- 1959
- 66 years old, rebuilt 2009
- Condition
- Good
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 92 ft
- 1 main span
- Daily traffic
- 296,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 405 over National Blvd is a concrete box beam or girders - multiple carrying Interstate 405 over National Blvd in Los Angeles County, California. It was built in 1959 and reconstructed in 2009, so it is 66 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 296,000 vehicles a day, roughly 10% of them trucks, projected to reach 392,446 by 2040. The structure is 92 ft (28 m) long and 157 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 405 over National Blvd built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2009.
What condition is Interstate 405 over National Blvd 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 April 2023.
How much traffic does Interstate 405 over National Blvd carry?
About 296,000 vehicles per day (2019 count), of which roughly 10% are trucks.
How long is Interstate 405 over National Blvd?
The structure is 92 ft (28 m) long with a longest span of 88 ft (26.8 m) and a deck 157 ft wide.
Who owns Interstate 405 over National Blvd?
It is owned by the State Highway Agency.