I-78 WB over Allerton Road
FairHunterdon County, New Jersey · 0.26 MI E of I-78 Exit 17 · Structure no. 1017162
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 46 ft
- 1 main span
- Daily traffic
- 58,595
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-78 WB over Allerton Road is a prestressed concrete stringer/multi-beam or girder carrying I-78 WB over Allerton Road 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 58,595 vehicles a day, roughly 9% of them trucks, projected to reach 71,495 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
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-78 WB over Allerton Road built?
It was built in 1968, making it 57 years old in 2025.
What condition is I-78 WB over Allerton Road 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 September 2024.
How much traffic does I-78 WB over Allerton Road carry?
About 58,595 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is I-78 WB over Allerton Road?
The structure is 46 ft (14 m) long with a longest span of 43 ft (13.1 m) and a deck 67 ft wide.
Who owns I-78 WB over Allerton Road?
It is owned by the State Highway Agency.