Interstate 405 over Hillside
GoodLos Angeles County, California · 07-LA-405-32.72-LA · Structure no. 53 2390
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected May 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 465 ft
- 15 main spans
- Daily traffic
- 268,700
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 405 over Hillside is a concrete continuous tee beam carrying Interstate 405 over Hillside in Los Angeles County, California. It was built in 1975, so it is 50 years old, younger 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 268,700 vehicles a day, roughly 4% of them trucks, projected to reach 391,134 by 2040. The structure is 465 ft (141.7 m) long and 10 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 | 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 Hillside built?
It was built in 1975, making it 50 years old in 2025.
What condition is Interstate 405 over Hillside 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 May 2023.
How much traffic does Interstate 405 over Hillside carry?
About 268,700 vehicles per day (2019 count), of which roughly 4% are trucks.
How long is Interstate 405 over Hillside?
The structure is 465 ft (141.7 m) long with a longest span of 31 ft (9.4 m) and a deck 10 ft wide.
Who owns Interstate 405 over Hillside?
It is owned by the State Highway Agency.