US Bridges

I-78 WB over Norfolk Southern

Fair

Hunterdon County, New Jersey · 4.86 MI E of US 22 · Structure no. 1014156

Built
1959
66 years old, rebuilt 1986
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
148 ft
1 main span
Daily traffic
98,397
2024 count
Owner
State
State Highway Agency

About this bridge

I-78 WB over Norfolk Southern is a steel stringer/multi-beam or girder carrying I-78 WB over Norfolk Southern in Hunterdon County, New Jersey. It was built in 1959 and reconstructed in 1986, so it is 66 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 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 98,397 vehicles a day, roughly 14% of them trucks, projected to reach 120,062 by 2044. 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).

CarriesI-78 WB
CrossesNorfolk Southern
Location4.86 MI E of US 22
RouteInterstate 78
Coordinates40.66202, -75.04736
Functional classRural 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 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 rating110.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span70 ft (21.3 m)
Deck width56 ft (17.1 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98,397 (2024)
Projected traffic120,062 by 2044
Trucks14%
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 Norfolk Southern built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1986.

What condition is I-78 WB over Norfolk Southern 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 February 2024.

How much traffic does I-78 WB over Norfolk Southern carry?

About 98,397 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I-78 WB over Norfolk Southern?

The structure is 148 ft (45.1 m) long with a longest span of 70 ft (21.3 m) and a deck 56 ft wide.

Who owns I-78 WB over Norfolk Southern?

It is owned by the State Highway Agency.