US Bridges

I 93 Ramp NS over RR MBTA

Fair

Suffolk County, Massachusetts · I93 US1 Interchange · Structure no. B166049THDOTNBI

Built
1999
26 years old
Condition
Fair
inspected September 2022
Type
Box Beam or Girders - Multiple
Steel
Length
91 ft
1 main span
Daily traffic
31,000
2014 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp NS over RR MBTA is a steel box beam or girders - multiple carrying I 93 Ramp NS over RR MBTA 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 31,000 vehicles a day, roughly 2% of them trucks, projected to reach 63,646 by 2031. The structure is 91 ft (27.6 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI 93 Ramp NS
CrossesRR MBTA
LocationI93 US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.38208, -71.07715
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.9 US tons
Inventory rating52.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length91 ft (27.6 m)
Longest span91 ft (27.6 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,000 (2014)
Projected traffic63,646 by 2031
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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$67,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp NS over RR MBTA built?

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

What condition is I 93 Ramp NS over RR MBTA 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 September 2022.

How much traffic does I 93 Ramp NS over RR MBTA carry?

About 31,000 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is I 93 Ramp NS over RR MBTA?

The structure is 91 ft (27.6 m) long with a longest span of 91 ft (27.6 m) and a deck 40 ft wide.

Who owns I 93 Ramp NS over RR MBTA?

It is owned by the State Highway Agency.