US Bridges

I 93 Ramps Sn NS over RR MBTA Bsg Spur

Good

Suffolk County, Massachusetts · I93/US1 Interchange · Structure no. B166059TYDOTNBI

Built
1999
26 years old
Condition
Good
inspected January 2022
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
419 ft
3 main spans
Daily traffic
38,735
2019 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramps Sn NS over RR MBTA Bsg Spur is a steel continuous box beam or girders - multiple carrying I 93 Ramps Sn NS over RR MBTA Bsg Spur in Suffolk County, Massachusetts. It was built in 1999, so it is 26 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 38,735 vehicles a day, roughly 4% of them trucks, projected to reach 275,793 by 2031. The structure is 419 ft (127.7 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI 93 Ramps Sn NS
CrossesRR MBTA Bsg Spur
LocationI93/US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.37766, -71.07577
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.8 US tons
Inventory rating55.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length419 ft (127.7 m)
Longest span147 ft (44.8 m)
Deck width50 ft (15.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,735 (2019)
Projected traffic275,793 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramps Sn NS over RR MBTA Bsg Spur built?

It was built in 1999, making it 26 years old in 2025.

What condition is I 93 Ramps Sn NS over RR MBTA Bsg Spur 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 January 2022.

How much traffic does I 93 Ramps Sn NS over RR MBTA Bsg Spur carry?

About 38,735 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is I 93 Ramps Sn NS over RR MBTA Bsg Spur?

The structure is 419 ft (127.7 m) long with a longest span of 147 ft (44.8 m) and a deck 50 ft wide.

Who owns I 93 Ramps Sn NS over RR MBTA Bsg Spur?

It is owned by the State Highway Agency.