US Bridges

I 93 Ramp NS over US 1 Ramp Tc

Good

Suffolk County, Massachusetts · I93/US1 Interchange · Structure no. B166068YRDOTNBI

Built
1999
26 years old
Condition
Good
inspected May 2022
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
368 ft
5 main spans
Daily traffic
19,945
2017 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp NS over US 1 Ramp Tc is a prestressed concrete continuous box beam or girders - single or spread carrying I 93 Ramp NS over US 1 Ramp Tc 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 19,945 vehicles a day, roughly 3% of them trucks, projected to reach 63,646 by 2031. The structure is 368 ft (112.2 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI 93 Ramp NS
CrossesUS 1 Ramp Tc
LocationI93/US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.37181, -71.06801
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 inspectionMay 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating45.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length368 ft (112.2 m)
Longest span82 ft (25 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck21 ft (6.4 m)

Traffic and service

Average daily traffic19,945 (2017)
Projected traffic63,646 by 2031
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp NS over US 1 Ramp Tc built?

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

What condition is I 93 Ramp NS over US 1 Ramp Tc 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 May 2022.

How much traffic does I 93 Ramp NS over US 1 Ramp Tc carry?

About 19,945 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is I 93 Ramp NS over US 1 Ramp Tc?

The structure is 368 ft (112.2 m) long with a longest span of 82 ft (25 m) and a deck 26 ft wide.

Who owns I 93 Ramp NS over US 1 Ramp Tc?

It is owned by the State Highway Agency.