US Bridges

I 90 EB On-Ramp over Comb I90 W Onrp a & CSX

Fair

Suffolk County, Massachusetts · At Toll Plazas S104B · Structure no. B163564RRDOTNBI

Built
1965
60 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
147 ft
4 main spans
Daily traffic
14,224
2024 count
Owner
State
State Highway Agency

About this bridge

I 90 EB On-Ramp over Comb I90 W Onrp a & CSX is a steel stringer/multi-beam or girder carrying I 90 EB On-Ramp over Comb I90 W Onrp a & CSX in Suffolk County, Massachusetts. It was built in 1965, so it is 60 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 14,224 vehicles a day, roughly 5% of them trucks, projected to reach 118,448 by 2031. The structure is 147 ft (44.8 m) long and 39 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI 90 EB On-Ramp
CrossesComb I90 W Onrp a & CSX
LocationAt Toll Plazas S104B
RouteInterstate 90
CountySuffolk County
StateMassachusetts
Coordinates42.35895, -71.12156
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.5 US tons
Inventory rating48.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length147 ft (44.8 m)
Longest span46 ft (14 m)
Deck width39 ft (11.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,224 (2024)
Projected traffic118,448 by 2031
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 EB On-Ramp over Comb I90 W Onrp a & CSX built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 90 EB On-Ramp over Comb I90 W Onrp a & CSX 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 July 2024.

How much traffic does I 90 EB On-Ramp over Comb I90 W Onrp a & CSX carry?

About 14,224 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is I 90 EB On-Ramp over Comb I90 W Onrp a & CSX?

The structure is 147 ft (44.8 m) long with a longest span of 46 ft (14 m) and a deck 39 ft wide.

Who owns I 90 EB On-Ramp over Comb I90 W Onrp a & CSX?

It is owned by the State Highway Agency.