US Bridges

US 1 Ramp Tc over I 93 Rmps Sn NS ST

Fair

Suffolk County, Massachusetts · I93/US1 Interchange · Structure no. B163928DGDOTNBI

Built
2002
23 years old
Condition
Fair
inspected August 2023
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
481 ft
3 main spans
Daily traffic
35,800
2017 count
Owner
State
State Highway Agency

About this bridge

US 1 Ramp Tc over I 93 Rmps Sn NS ST is a prestressed concrete continuous segmental box girder carrying US 1 Ramp Tc over I 93 Rmps Sn NS ST in Suffolk County, Massachusetts. It was built in 2002, so it is 23 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 35,800 vehicles a day, roughly 8% of them trucks, projected to reach 275,793 by 2032. The structure is 481 ft (146.5 m) long and 47 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesUS 1 Ramp Tc
CrossesI 93 Rmps Sn NS ST
LocationI93/US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.37203, -71.06823
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating50 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckOther
Main spans3
Design loadHS 20
Structure length481 ft (146.5 m)
Longest span178 ft (54.2 m)
Deck width47 ft (14.3 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic35,800 (2017)
Projected traffic275,793 by 2032
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$4.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 2002, making it 23 years old in 2025.

What condition is US 1 Ramp Tc over I 93 Rmps Sn NS ST 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 August 2023.

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

About 35,800 vehicles per day (2017 count), of which roughly 8% are trucks.

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

The structure is 481 ft (146.5 m) long with a longest span of 178 ft (54.2 m) and a deck 47 ft wide.

Who owns US 1 Ramp Tc over I 93 Rmps Sn NS ST?

It is owned by the State Highway Agency.