US Bridges

I 93 Ramp N-S over Comb Nashua St&mgh Pkng

Good

Suffolk County, Massachusetts · Leverett Circle Boston · Structure no. B16606634DOTNBI

Built
1999
26 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
231 ft
2 main spans
Daily traffic
35,899
2023 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp N-S over Comb Nashua St&mgh Pkng is a steel continuous box beam or girders - multiple carrying I 93 Ramp N-S over Comb Nashua St&mgh Pkng 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 231 ft (70.3 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesI 93 Ramp N-S
CrossesComb Nashua St&mgh Pkng
LocationLeverett Circle Boston
RouteInterstate 93
Coordinates42.36645, -71.06383
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.8 US tons
Inventory rating28.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length231 ft (70.3 m)
Longest span116 ft (35.5 m)
Deck width44 ft (13.4 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,899 (2023)
Projected traffic72,618 by 2031
Trucks4%
Lanes on structure2
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp N-S over Comb Nashua St&mgh Pkng built?

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

What condition is I 93 Ramp N-S over Comb Nashua St&mgh Pkng 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 Comb Nashua St&mgh Pkng carry?

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

How long is I 93 Ramp N-S over Comb Nashua St&mgh Pkng?

The structure is 231 ft (70.3 m) long with a longest span of 116 ft (35.5 m) and a deck 44 ft wide.

Who owns I 93 Ramp N-S over Comb Nashua St&mgh Pkng?

It is owned by the State Highway Agency.