US Bridges

I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel

Good

Suffolk County, Massachusetts · Leverett Cir-Unit 1 · Structure no. B166206JLDOTNBI

Built
1999
26 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
35,899
2023 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel is a prestressed concrete stringer/multi-beam or girder carrying I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel 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 35,899 vehicles a day, roughly 4% of them trucks, projected to reach 72,618 by 2031. The structure is 97 ft (29.6 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI 93 Ramp N-S
CrossesI 93 Ramp Lc-S Tunnel
LocationLeverett Cir-Unit 1
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.36638, -71.0652
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length97 ft (29.6 m)
Longest span92 ft (28.1 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic35,899 (2023)
Projected traffic72,618 by 2031
Trucks4%
Lanes on structure3
Traffic directionOne-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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel built?

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

What condition is I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel 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 2024.

How much traffic does I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel carry?

About 35,899 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel?

The structure is 97 ft (29.6 m) long with a longest span of 92 ft (28.1 m) and a deck 40 ft wide.

Who owns I 93 Ramp N-S over I 93 Ramp Lc-S Tunnel?

It is owned by the State Highway Agency.