US Bridges

I 93 Ramp NS over US 1 Ramp Tc & Lc

Fair

Suffolk County, Massachusetts · I93/US1 Interchange · Structure no. B166068YUDOTNBI

Built
1999
26 years old
Condition
Fair
inspected May 2022
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
774 ft
6 main spans
Daily traffic
20,547
2019 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp NS over US 1 Ramp Tc & Lc is a prestressed concrete continuous segmental box girder carrying I 93 Ramp NS over US 1 Ramp Tc & Lc 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20,547 vehicles a day, roughly 4% of them trucks, projected to reach 63,646 by 2031. The structure is 774 ft (235.9 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesI 93 Ramp NS
CrossesUS 1 Ramp Tc & Lc
LocationI93/US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.37068, -71.06649
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.3 US tons
Inventory rating52.4 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckOther
Main spans6
Design loadHS 25 or greater
Structure length774 ft (235.9 m)
Longest span143 ft (43.6 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,547 (2019)
Projected traffic63,646 by 2031
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$6.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp NS over US 1 Ramp Tc & Lc 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 & Lc in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2022.

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

About 20,547 vehicles per day (2019 count), of which roughly 4% are trucks.

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

The structure is 774 ft (235.9 m) long with a longest span of 143 ft (43.6 m) and a deck 26 ft wide.

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

It is owned by the State Highway Agency.