US Bridges

I-78 WB over Nj Transit(rar.Val.Line)

Fair

Hunterdon County, New Jersey · 0.22 MI E of I-78 Exit 18 · Structure no. 1018156

Built
1968
57 years old, rebuilt 1994
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
148 ft
3 main spans
Daily traffic
64,680
2023 count
Owner
State
State Highway Agency

About this bridge

I-78 WB over Nj Transit(rar.Val.Line) is a prestressed concrete stringer/multi-beam or girder carrying I-78 WB over Nj Transit(rar.Val.Line) in Hunterdon County, New Jersey. It was built in 1968 and reconstructed in 1994, so it is 57 years old, younger 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 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 64,680 vehicles a day, roughly 9% of them trucks, projected to reach 77,616 by 2043. The structure is 148 ft (45.1 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-78 WB
CrossesNj Transit(rar.Val.Line)
Location0.22 MI E of I-78 Exit 18
RouteInterstate 78
CountyHunterdon County
StateNew Jersey
Coordinates40.6434, -74.86671
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length148 ft (45.1 m)
Longest span53 ft (16.2 m)
Deck width56 ft (17.1 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,680 (2023)
Projected traffic77,616 by 2043
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 over Nj Transit(rar.Val.Line) built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1994.

What condition is I-78 WB over Nj Transit(rar.Val.Line) 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 March 2023.

How much traffic does I-78 WB over Nj Transit(rar.Val.Line) carry?

About 64,680 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-78 WB over Nj Transit(rar.Val.Line)?

The structure is 148 ft (45.1 m) long with a longest span of 53 ft (16.2 m) and a deck 56 ft wide.

Who owns I-78 WB over Nj Transit(rar.Val.Line)?

It is owned by the State Highway Agency.