US Bridges

I-78EB(US 22 Eb) over Allerton Road (co. 633)

Fair

Hunterdon County, New Jersey · .26 MI E.Of I-78 EXIT-17 · Structure no. 1017161

Built
1968
57 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
58,650
2024 count
Owner
State
State Highway Agency

About this bridge

I-78EB(US 22 Eb) over Allerton Road (co. 633) is a prestressed concrete stringer/multi-beam or girder carrying I-78EB(US 22 Eb) over Allerton Road (co. 633) in Hunterdon County, New Jersey. It was built in 1968, 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 58,650 vehicles a day, roughly 9% of them trucks, projected to reach 71,564 by 2044. The structure is 46 ft (14 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-78EB(US 22 Eb)
CrossesAllerton Road (co. 633)
Location.26 MI E.Of I-78 EXIT-17
RouteInterstate 78
CountyHunterdon County
StateNew Jersey
Coordinates40.63828, -74.88258
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length46 ft (14 m)
Longest span42 ft (12.8 m)
Deck width67 ft (20.3 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,650 (2024)
Projected traffic71,564 by 2044
Trucks9%
Lanes on structure4
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-78EB(US 22 Eb) over Allerton Road (co. 633) built?

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

What condition is I-78EB(US 22 Eb) over Allerton Road (co. 633) 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 July 2024.

How much traffic does I-78EB(US 22 Eb) over Allerton Road (co. 633) carry?

About 58,650 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I-78EB(US 22 Eb) over Allerton Road (co. 633)?

The structure is 46 ft (14 m) long with a longest span of 42 ft (12.8 m) and a deck 67 ft wide.

Who owns I-78EB(US 22 Eb) over Allerton Road (co. 633)?

It is owned by the State Highway Agency.