US Bridges

I-78 EB over US 22 WB

Fair

Hunterdon County, New Jersey · 0.96 Mile of JCT 78 & 31 · Structure no. 1018153

Built
1968
57 years old, rebuilt 1985
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
661,439
2023 count
Owner
State
State Highway Agency

About this bridge

I-78 EB over US 22 WB is a steel stringer/multi-beam or girder carrying I-78 EB over US 22 WB in Hunterdon County, New Jersey. It was built in 1968 and reconstructed in 1985, 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 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 661,439 vehicles a day, roughly 9% of them trucks, projected to reach 73,727 by 2043. The structure is 71 ft (21.6 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-78 EB
CrossesUS 22 WB
Location0.96 Mile of JCT 78 & 31
RouteInterstate 78
Coordinates40.64228, -74.8705
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating66 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length71 ft (21.6 m)
Longest span64 ft (19.5 m)
Deck width56 ft (17.2 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic661,439 (2023)
Projected traffic73,727 by 2043
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 EB over US 22 WB built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1985.

What condition is I-78 EB over US 22 WB 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 EB over US 22 WB carry?

About 661,439 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-78 EB over US 22 WB?

The structure is 71 ft (21.6 m) long with a longest span of 64 ft (19.5 m) and a deck 56 ft wide.

Who owns I-78 EB over US 22 WB?

It is owned by the State Highway Agency.