State Route 1 over Main Street
GoodSan Luis Obispo County, California · 05-SLO-001-29.62-MOBY · Structure no. 49 0109
- Built
- 1962
- 63 years old, rebuilt 1999
- Condition
- Good
- inspected September 2021
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 61 ft
- 1 main span
- Daily traffic
- 24,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Main Street is a concrete box beam or girders - multiple carrying State Route 1 over Main Street in San Luis Obispo County, California. It was built in 1962 and reconstructed in 1999, so it is 63 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 24,000 vehicles a day, roughly 4% of them trucks, projected to reach 32,342 by 2043. The structure is 61 ft (18.6 m) long and 89 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 State Route 1 over Main Street built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1999.
What condition is State Route 1 over Main Street 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 September 2021.
How much traffic does State Route 1 over Main Street carry?
About 24,000 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is State Route 1 over Main Street?
The structure is 61 ft (18.6 m) long with a longest span of 59 ft (18.1 m) and a deck 89 ft wide.
Who owns State Route 1 over Main Street?
It is owned by the State Highway Agency.