US Bridges

Potterstown Road over I-78

Fair

Hunterdon County, New Jersey · 5.5 MI East of Rt 31 · Structure no. 1018163

Built
1965
60 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
208 ft
2 main spans
Daily traffic
5,401
2024 count
Owner
State
State Highway Agency

About this bridge

Potterstown Road over I-78 is a steel stringer/multi-beam or girder carrying Potterstown Road over I-78 in Hunterdon County, New Jersey. It was built in 1965, so it is 60 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 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 5,401 vehicles a day, roughly 1% of them trucks, projected to reach 6,591 by 2044. The structure is 208 ft (63.4 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPotterstown Road
CrossesI-78
Location5.5 MI East of Rt 31
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.65039, -74.79119
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length208 ft (63.4 m)
Longest span101 ft (30.8 m)
Deck width44 ft (13.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic5,401 (2024)
Projected traffic6,591 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Potterstown Road over I-78 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Potterstown Road 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 April 2024.

How much traffic does Potterstown Road over I-78 carry?

About 5,401 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Potterstown Road over I-78?

The structure is 208 ft (63.4 m) long with a longest span of 101 ft (30.8 m) and a deck 44 ft wide.

Who owns Potterstown Road over I-78?

It is owned by the State Highway Agency.