State Route 1 over Gateway Drive
GoodSan Mateo County, California · 04-SM-001-R46.51-DLC · Structure no. 35 0192
- Built
- 1964
- 61 years old, rebuilt 1972
- Condition
- Good
- inspected October 2022
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 136 ft
- 3 main spans
- Daily traffic
- 43,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Gateway Drive is a concrete continuous box beam or girders - multiple carrying State Route 1 over Gateway Drive in San Mateo County, California. It was built in 1964 and reconstructed in 1972, so it is 61 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 43,500 vehicles a day, roughly 2% of them trucks, projected to reach 62,847 by 2040. The structure is 136 ft (41.4 m) long and 187 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 State Route 1 over Gateway Drive built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1972.
What condition is State Route 1 over Gateway Drive 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 2022.
How much traffic does State Route 1 over Gateway Drive carry?
About 43,500 vehicles per day (2009 count), of which roughly 2% are trucks.
How long is State Route 1 over Gateway Drive?
The structure is 136 ft (41.4 m) long with a longest span of 62 ft (18.9 m) and a deck 187 ft wide.
Who owns State Route 1 over Gateway Drive?
It is owned by the State Highway Agency.