HWY Trmnt-Arlngt over RR Amtrak/Mbta
PoorSuffolk County, Massachusetts · .16 KM S of I90 · Structure no. B160813HPDOT634
- Built
- 1979
- 46 years old
- Condition
- Poor
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 74 ft
- 2 main spans
- Daily traffic
- 30,400
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
HWY Trmnt-Arlngt over RR Amtrak/Mbta is a steel stringer/multi-beam or girder carrying HWY Trmnt-Arlngt over RR Amtrak/Mbta in Suffolk County, Massachusetts. It was built in 1979, so it is 46 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.
It carries about 30,400 vehicles a day, roughly 7% of them trucks, projected to reach 34,271 by 2031. The structure is 74 ft (22.6 m) long and 400 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY Trmnt-Arlngt over RR Amtrak/Mbta built?
It was built in 1979, making it 46 years old in 2025.
What condition is HWY Trmnt-Arlngt over RR Amtrak/Mbta 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 December 2024.
How much traffic does HWY Trmnt-Arlngt over RR Amtrak/Mbta carry?
About 30,400 vehicles per day (2018 count), of which roughly 7% are trucks.
How long is HWY Trmnt-Arlngt over RR Amtrak/Mbta?
The structure is 74 ft (22.6 m) long with a longest span of 44 ft (13.4 m) and a deck 400 ft wide.
Who owns HWY Trmnt-Arlngt over RR Amtrak/Mbta?
It is owned by the State Highway Agency.