US Bridges

I-78 WB Ramp a over I-287 SB and Ramp

Fair

Somerset County, New Jersey · .2 MI South of I-287 JCT · Structure no. 1814164

Built
1963
62 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
324 ft
4 main spans
Daily traffic
22,401
2024 count
Owner
State
State Highway Agency

About this bridge

I-78 WB Ramp a over I-287 SB and Ramp is a steel stringer/multi-beam or girder carrying I-78 WB Ramp a over I-287 SB and Ramp in Somerset County, New Jersey. It was built in 1963, so it is 62 years old, older than the New Jersey average of 58.5 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 22,401 vehicles a day, roughly 9% of them trucks, projected to reach 27,330 by 2044. The structure is 324 ft (98.8 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-78 WB Ramp a
CrossesI-287 SB and Ramp
Location.2 MI South of I-287 JCT
RouteInterstate 78
CountySomerset County
StateNew Jersey
Coordinates40.63941, -74.64547
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length324 ft (98.8 m)
Longest span111 ft (33.8 m)
Deck width38 ft (11.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,401 (2024)
Projected traffic27,330 by 2044
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-78 WB Ramp a over I-287 SB and Ramp built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-78 WB Ramp a over I-287 SB and Ramp 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 2024.

How much traffic does I-78 WB Ramp a over I-287 SB and Ramp carry?

About 22,401 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I-78 WB Ramp a over I-287 SB and Ramp?

The structure is 324 ft (98.8 m) long with a longest span of 111 ft (33.8 m) and a deck 38 ft wide.

Who owns I-78 WB Ramp a over I-287 SB and Ramp?

It is owned by the State Highway Agency.