Nj 173 over I-78
FairWarren County, New Jersey · 4 MI East of Pa.Stateline · Structure no. 2103155
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 302 ft
- 2 main spans
- Daily traffic
- 7,542
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Nj 173 over I-78 is a steel continuous stringer/multi-beam or girder carrying Nj 173 over I-78 in Warren County, New Jersey. It was built in 1987, so it is 38 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 7,542 vehicles a day, roughly 4% of them trucks, projected to reach 9,559 by 2044. The structure is 302 ft (92 m) long and 60 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 | 7 Good | Some minor problems. |
| 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 Nj 173 over I-78 built?
It was built in 1987, making it 38 years old in 2025.
What condition is Nj 173 over I-78 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 August 2024.
How much traffic does Nj 173 over I-78 carry?
About 7,542 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is Nj 173 over I-78?
The structure is 302 ft (92 m) long with a longest span of 148 ft (45.1 m) and a deck 60 ft wide.
Who owns Nj 173 over I-78?
It is owned by the State Highway Agency.