US Highway 101 NB over Willow Road
FairSan Luis Obispo County, California · 05-SLO-101-6.45 · Structure no. 49 0252R
- Built
- 2012
- 13 years old
- Condition
- Fair
- inspected January 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 147 ft
- 1 main span
- Daily traffic
- 27,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Willow Road is a prestressed concrete box beam or girders - multiple carrying US Highway 101 NB over Willow Road in San Luis Obispo County, California. It was built in 2012, so it is 13 years old, younger 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 27,000 vehicles a day, roughly 21% of them trucks, projected to reach 54,320 by 2044. The structure is 147 ft (44.8 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 NB over Willow Road built?
It was built in 2012, making it 13 years old in 2025.
What condition is US Highway 101 NB over Willow Road 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 January 2024.
How much traffic does US Highway 101 NB over Willow Road carry?
About 27,000 vehicles per day (2009 count), of which roughly 21% are trucks.
How long is US Highway 101 NB over Willow Road?
The structure is 147 ft (44.8 m) long with a longest span of 142 ft (43.3 m) and a deck 42 ft wide.
Who owns US Highway 101 NB over Willow Road?
It is owned by the State Highway Agency.