I 495 SB over HWY Boston RD
PoorMiddlesex County, Massachusetts · 0.2 MI N of ST-110 · Structure no. W2601927VDOTNBI
- Built
- 1959
- 66 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 127 ft
- 3 main spans
- Daily traffic
- 59,349
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I 495 SB over HWY Boston RD is a steel stringer/multi-beam or girder carrying I 495 SB over HWY Boston RD in Middlesex County, Massachusetts. It was built in 1959, so it is 66 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 3 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 59,349 vehicles a day, roughly 5% of them trucks, projected to reach 86,862 by 2031. The structure is 127 ft (38.7 m) long and 57 ft wide.
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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 495 SB over HWY Boston RD built?
It was built in 1959, making it 66 years old in 2025.
What condition is I 495 SB over HWY Boston RD 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 495 SB over HWY Boston RD carry?
About 59,349 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is I 495 SB over HWY Boston RD?
The structure is 127 ft (38.7 m) long with a longest span of 55 ft (16.8 m) and a deck 57 ft wide.
Who owns I 495 SB over HWY Boston RD?
It is owned by the State Highway Agency.