N101-SFO Arprt Off over Millbrae AV-N101 on Ramp
GoodSan Mateo County, California · 04-SM-101-18.54 · Structure no. 35 0327S
- Built
- 2000
- 25 years old
- Condition
- Good
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 2,103 ft
- 14 main spans
- Daily traffic
- 8,000
- 2000 count
- Owner
- State
- State Highway Agency
About this bridge
N101-SFO Arprt Off over Millbrae AV-N101 on Ramp is a prestressed concrete continuous box beam or girders - multiple carrying N101-SFO Arprt Off over Millbrae AV-N101 on Ramp in San Mateo County, California. It was built in 2000, so it is 25 years old, younger 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 8,000 vehicles a day, roughly 3% of them trucks, projected to reach 17,101 by 2040. The structure is 2,103 ft (641 m) long and 39 ft wide. If it were closed, the detour would be 2.5 mi (4 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 N101-SFO Arprt Off over Millbrae AV-N101 on Ramp built?
It was built in 2000, making it 25 years old in 2025.
What condition is N101-SFO Arprt Off over Millbrae AV-N101 on Ramp 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 April 2023.
How much traffic does N101-SFO Arprt Off over Millbrae AV-N101 on Ramp carry?
About 8,000 vehicles per day (2000 count), of which roughly 3% are trucks.
How long is N101-SFO Arprt Off over Millbrae AV-N101 on Ramp?
The structure is 2,103 ft (641 m) long with a longest span of 154 ft (47 m) and a deck 39 ft wide.
Who owns N101-SFO Arprt Off over Millbrae AV-N101 on Ramp?
It is owned by the State Highway Agency.