US Bridges

I-78 EB over I-287 NB

Good

Somerset County, New Jersey · At I-287 Interchange · Structure no. 1817153

Built
1963
62 years old, rebuilt 2007
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
162 ft
3 main spans
Daily traffic
57,656
2023 count
Owner
State
State Highway Agency

About this bridge

I-78 EB over I-287 NB is a steel stringer/multi-beam or girder carrying I-78 EB over I-287 NB in Somerset County, New Jersey. It was built in 1963 and reconstructed in 2007, 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 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 57,656 vehicles a day, roughly 9% of them trucks, projected to reach 69,187 by 2043. The structure is 162 ft (49.4 m) long and 55 ft wide.

Location

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CarriesI-78 EB
CrossesI-287 NB
LocationAt I-287 Interchange
RouteInterstate 78
CountySomerset County
StateNew Jersey
Coordinates40.64246, -74.64526
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length162 ft (49.4 m)
Longest span117 ft (35.7 m)
Deck width55 ft (16.7 m)
Roadway width52 ft (15.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,656 (2023)
Projected traffic69,187 by 2043
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 EB over I-287 NB built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2007.

What condition is I-78 EB over I-287 NB 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 March 2023.

How much traffic does I-78 EB over I-287 NB carry?

About 57,656 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-78 EB over I-287 NB?

The structure is 162 ft (49.4 m) long with a longest span of 117 ft (35.7 m) and a deck 55 ft wide.

Who owns I-78 EB over I-287 NB?

It is owned by the State Highway Agency.