ST 1 A/Washington over I 95 Sb/St 128 SB
GoodNorfolk County, Massachusetts · US 1A at ST 128 · Structure no. D05045B1HDOTNBI
- Built
- 2010
- 15 years old
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 115 ft
- 1 main span
- Daily traffic
- 28,448
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
ST 1 A/Washington over I 95 Sb/St 128 SB is a steel stringer/multi-beam or girder carrying ST 1 A/Washington over I 95 Sb/St 128 SB in Norfolk County, Massachusetts. It was built in 2010, so it is 15 years old, younger than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 28,448 vehicles a day, roughly 5% of them trucks, projected to reach 34,903 by 2032. The structure is 115 ft (35.1 m) long and 68 ft wide. If it were closed, the detour would be 4.3 mi (7 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST 1 A/Washington over I 95 Sb/St 128 SB built?
It was built in 2010, making it 15 years old in 2025.
What condition is ST 1 A/Washington over I 95 Sb/St 128 SB in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.
How much traffic does ST 1 A/Washington over I 95 Sb/St 128 SB carry?
About 28,448 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is ST 1 A/Washington over I 95 Sb/St 128 SB?
The structure is 115 ft (35.1 m) long with a longest span of 108 ft (33 m) and a deck 68 ft wide.
Who owns ST 1 A/Washington over I 95 Sb/St 128 SB?
It is owned by the State Highway Agency.