ST 1 A/N Shore RD over ST 1 A/Ramp A&b
FairSuffolk County, Massachusetts · 4.8 KM NE JCT SR 60&SR1A · Structure no. R0505439HDOTNBI
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 109 ft
- 1 main span
- Daily traffic
- 34,214
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
ST 1 A/N Shore RD over ST 1 A/Ramp A&b is a steel stringer/multi-beam or girder carrying ST 1 A/N Shore RD over ST 1 A/Ramp A&b in Suffolk County, Massachusetts. It was built in 1972, so it is 53 years old, younger than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 34,214 vehicles a day, roughly 8% of them trucks, projected to reach 53,380 by 2031. The structure is 109 ft (33.2 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
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST 1 A/N Shore RD over ST 1 A/Ramp A&b built?
It was built in 1972, making it 53 years old in 2025.
What condition is ST 1 A/N Shore RD over ST 1 A/Ramp A&b in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.
How much traffic does ST 1 A/N Shore RD over ST 1 A/Ramp A&b carry?
About 34,214 vehicles per day (2024 count), of which roughly 8% are trucks.
How long is ST 1 A/N Shore RD over ST 1 A/Ramp A&b?
The structure is 109 ft (33.2 m) long with a longest span of 104 ft (31.6 m) and a deck 89 ft wide.
Who owns ST 1 A/N Shore RD over ST 1 A/Ramp A&b?
It is owned by the State Highway Agency.