US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx
GoodSuffolk County, Massachusetts · .1MI.S.STORROW DR S48 · Structure no. B160554T0DOTNBI
- Built
- 1965
- 60 years old, rebuilt 2018
- Condition
- Good
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 380 ft
- 3 main spans
- Daily traffic
- 40,783
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx is a steel stringer/multi-beam or girder carrying US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx in Suffolk County, Massachusetts. It was built in 1965 and reconstructed in 2018, 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 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 40,783 vehicles a day, roughly 8% of them trucks, projected to reach 32,060 by 2031. The structure is 380 ft (115.8 m) long and 162 ft wide. If it were closed, the detour would be 3.1 mi (5 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 US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2018.
What condition is US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx 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 March 2023.
How much traffic does US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx carry?
About 40,783 vehicles per day (2018 count), of which roughly 8% are trucks.
How long is US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx?
The structure is 380 ft (115.8 m) long with a longest span of 152 ft (46.3 m) and a deck 162 ft wide.
Who owns US 20 Comm Av/Mbta over Comb I 90 & Mbta/Csx?
It is owned by the State Highway Agency.