I 93 Ramp Sn over US 1 Ramp Tc
GoodSuffolk County, Massachusetts · I93/US1 Interchange · Structure no. B166078YLDOTNBI
- Built
- 1999
- 26 years old
- Condition
- Good
- inspected October 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 298 ft
- 4 main spans
- Daily traffic
- 56,897
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I 93 Ramp Sn over US 1 Ramp Tc is a prestressed concrete continuous box beam or girders - single or spread carrying I 93 Ramp Sn over US 1 Ramp Tc in Suffolk County, Massachusetts. It was built in 1999, so it is 26 years old, younger than the Massachusetts average of 63.8 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 56,897 vehicles a day, roughly 3% of them trucks, projected to reach 275,793 by 2031. The structure is 298 ft (90.8 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 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 I 93 Ramp Sn over US 1 Ramp Tc built?
It was built in 1999, making it 26 years old in 2025.
What condition is I 93 Ramp Sn over US 1 Ramp Tc 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 I 93 Ramp Sn over US 1 Ramp Tc carry?
About 56,897 vehicles per day (2024 count), of which roughly 3% are trucks.
How long is I 93 Ramp Sn over US 1 Ramp Tc?
The structure is 298 ft (90.8 m) long with a longest span of 81 ft (24.7 m) and a deck 35 ft wide.
Who owns I 93 Ramp Sn over US 1 Ramp Tc?
It is owned by the State Highway Agency.