HWY Boylston ST over Comb I 90 & Mbta/Csx
PoorSuffolk County, Massachusetts · At Pru Center S55 · Structure no. B160504T6DOTNBI
- Built
- 1965
- 60 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 450 ft
- 3 main spans
- Daily traffic
- 10,300
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
HWY Boylston ST over Comb I 90 & Mbta/Csx is a steel stringer/multi-beam or girder carrying HWY Boylston ST over Comb I 90 & Mbta/Csx in Suffolk County, Massachusetts. It was built in 1965, so it is 60 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, posting recommended but not legally implemented.
It carries about 10,300 vehicles a day, roughly 10% of them trucks, projected to reach 48,485 by 2031. The structure is 450 ft (137.2 m) long and 82 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY Boylston ST over Comb I 90 & Mbta/Csx built?
It was built in 1965, making it 60 years old in 2025.
What condition is HWY Boylston ST over Comb I 90 & Mbta/Csx 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 August 2024.
How much traffic does HWY Boylston ST over Comb I 90 & Mbta/Csx carry?
About 10,300 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is HWY Boylston ST over Comb I 90 & Mbta/Csx?
The structure is 450 ft (137.2 m) long with a longest span of 174 ft (53 m) and a deck 82 ft wide.
Who owns HWY Boylston ST over Comb I 90 & Mbta/Csx?
It is owned by the State Highway Agency.