US Highway 101 NB over I 405 & N101-S405 Ramp
FairLos Angeles County, California · 07-LA-101-17.14R-LA · Structure no. 53 1146R
- Built
- 1958
- 67 years old, rebuilt 1971
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 214 ft
- 3 main spans
- Daily traffic
- 229,750
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over I 405 & N101-S405 Ramp is a concrete continuous box beam or girders - multiple carrying US Highway 101 NB over I 405 & N101-S405 Ramp in Los Angeles County, California. It was built in 1958 and reconstructed in 1971, so it is 67 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 229,750 vehicles a day, roughly 10% of them trucks, projected to reach 335,694 by 2045. The structure is 214 ft (65.2 m) long and 74 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 US Highway 101 NB over I 405 & N101-S405 Ramp built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1971.
What condition is US Highway 101 NB over I 405 & N101-S405 Ramp 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 March 2024.
How much traffic does US Highway 101 NB over I 405 & N101-S405 Ramp carry?
About 229,750 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is US Highway 101 NB over I 405 & N101-S405 Ramp?
The structure is 214 ft (65.2 m) long with a longest span of 90 ft (27.4 m) and a deck 74 ft wide.
Who owns US Highway 101 NB over I 405 & N101-S405 Ramp?
It is owned by the State Highway Agency.