US Bridges

I 93 NB over Comb I90 Rps&hov&amtk

Fair

Suffolk County, Massachusetts · 0.2 MI N I-90 EB · Structure no. B166618QXDOTNBI

Built
2002
23 years old
Condition
Fair
inspected August 2023
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
657 ft
5 main spans
Daily traffic
116,800
2019 count
Owner
State
State Highway Agency

About this bridge

I 93 NB over Comb I90 Rps&hov&amtk is a prestressed concrete continuous segmental box girder carrying I 93 NB over Comb I90 Rps&hov&amtk 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 5 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 116,800 vehicles a day, roughly 7% of them trucks, projected to reach 136,262 by 2032. The structure is 657 ft (200.2 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI 93 NB
CrossesComb I90 Rps&hov&amtk
Location0.2 MI N I-90 EB
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.34546, -71.05999
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 rating76.7 US tons
Inventory rating46 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckOther
Main spans5
Design loadHS 20
Structure length657 ft (200.2 m)
Longest span179 ft (54.7 m)
Deck width54 ft (16.5 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic116,800 (2019)
Projected traffic136,262 by 2032
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 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 with deck rehabilitation or replacement
Estimated improvement cost$40.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 NB over Comb I90 Rps&hov&amtk built?

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

What condition is I 93 NB over Comb I90 Rps&hov&amtk 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 I 93 NB over Comb I90 Rps&hov&amtk carry?

About 116,800 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is I 93 NB over Comb I90 Rps&hov&amtk?

The structure is 657 ft (200.2 m) long with a longest span of 179 ft (54.7 m) and a deck 54 ft wide.

Who owns I 93 NB over Comb I90 Rps&hov&amtk?

It is owned by the State Highway Agency.