U.S. Highway 101 over Route 170
GoodLos Angeles County, California · 07-LA-101-11.75R-LA · Structure no. 53 1336R
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 704 ft
- 8 main spans
- Daily traffic
- 118,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Route 170 is a concrete continuous box beam or girders - multiple carrying U.S. Highway 101 over Route 170 in Los Angeles County, California. It was built in 1959, 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 118,000 vehicles a day, roughly 10% of them trucks, projected to reach 159,490 by 2042. The structure is 704 ft (214.7 m) long and 82 ft wide. If it were closed, the detour would be 1.9 mi (3 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 U.S. Highway 101 over Route 170 built?
It was built in 1959, making it 66 years old in 2025.
What condition is U.S. Highway 101 over Route 170 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 March 2024.
How much traffic does U.S. Highway 101 over Route 170 carry?
About 118,000 vehicles per day (2021 count), of which roughly 10% are trucks.
How long is U.S. Highway 101 over Route 170?
The structure is 704 ft (214.7 m) long with a longest span of 110 ft (33.5 m) and a deck 82 ft wide.
Who owns U.S. Highway 101 over Route 170?
It is owned by the State Highway Agency.