I 93 NB/US1SB over ST 24 NB
PoorNorfolk County, Massachusetts · I 93 at ST 24 · Structure no. R01005359DOTNBI
- Built
- 1958
- 67 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 212 ft
- 3 main spans
- Daily traffic
- 101,100
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I 93 NB/US1SB over ST 24 NB is a steel continuous stringer/multi-beam or girder carrying I 93 NB/US1SB over ST 24 NB in Norfolk County, Massachusetts. It was built in 1958, so it is 67 years old, older than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 101,100 vehicles a day, roughly 6% of them trucks, projected to reach 315,860 by 2031. The structure is 212 ft (64.6 m) long and 58 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 93 NB/US1SB over ST 24 NB built?
It was built in 1958, making it 67 years old in 2025.
What condition is I 93 NB/US1SB over ST 24 NB in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does I 93 NB/US1SB over ST 24 NB carry?
About 101,100 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is I 93 NB/US1SB over ST 24 NB?
The structure is 212 ft (64.6 m) long with a longest span of 91 ft (27.7 m) and a deck 58 ft wide.
Who owns I 93 NB/US1SB over ST 24 NB?
It is owned by the State Highway Agency.