I 93 Bt SB4-N Abt over HWY Connectors D & K
PoorSuffolk County, Massachusetts · 1.9 KM N of Jct. US1&I93 · Structure no. B162818R8DOTNBI
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 366 ft
- 4 main spans
- Daily traffic
- 77,596
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
I 93 Bt SB4-N Abt over HWY Connectors D & K is a steel continuous stringer/multi-beam or girder carrying I 93 Bt SB4-N Abt over HWY Connectors D & K in Suffolk County, Massachusetts. It was built in 1970, so it is 55 years old, younger 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. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 77,596 vehicles a day, roughly 6% of them trucks, projected to reach 240,054 by 2032. The structure is 366 ft (111.5 m) long and 71 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 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 | 7 Good | Some minor problems. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, 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 I 93 Bt SB4-N Abt over HWY Connectors D & K built?
It was built in 1970, making it 55 years old in 2025.
What condition is I 93 Bt SB4-N Abt over HWY Connectors D & K 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 November 2023.
How much traffic does I 93 Bt SB4-N Abt over HWY Connectors D & K carry?
About 77,596 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is I 93 Bt SB4-N Abt over HWY Connectors D & K?
The structure is 366 ft (111.5 m) long with a longest span of 131 ft (39.8 m) and a deck 71 ft wide.
Who owns I 93 Bt SB4-N Abt over HWY Connectors D & K?
It is owned by the State Highway Agency.