State Route 1 NB over Clarendon Road
GoodSan Mateo County, California · 04-SM-001-R43.74-PFA · Structure no. 35 0021R
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected October 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 125 ft
- 3 main spans
- Daily traffic
- 16,250
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 NB over Clarendon Road is a concrete continuous tee beam carrying State Route 1 NB over Clarendon Road in San Mateo County, California. It was built in 1965, so it is 60 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 16,250 vehicles a day, roughly 3% of them trucks, projected to reach 25,008 by 2046. The structure is 125 ft (38.1 m) long and 40 ft wide. If it were closed, the detour would be 11.2 mi (18 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 NB over Clarendon Road built?
It was built in 1965, making it 60 years old in 2025.
What condition is State Route 1 NB over Clarendon Road 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 October 2024.
How much traffic does State Route 1 NB over Clarendon Road carry?
About 16,250 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is State Route 1 NB over Clarendon Road?
The structure is 125 ft (38.1 m) long with a longest span of 63 ft (19.2 m) and a deck 40 ft wide.
Who owns State Route 1 NB over Clarendon Road?
It is owned by the State Highway Agency.