US Bridges

I-78 EB over Landsdown Trail

Fair

Hunterdon County, New Jersey · 1 MI West of Rt 31 · Structure no. 1016154

Built
1958
67 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
115 ft
3 main spans
Daily traffic
54,157
2022 count
Owner
State
State Highway Agency

About this bridge

I-78 EB over Landsdown Trail is a prestressed concrete stringer/multi-beam or girder carrying I-78 EB over Landsdown Trail in Hunterdon County, New Jersey. It was built in 1958, so it is 67 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 54,157 vehicles a day, roughly 9% of them trucks, projected to reach 66,082 by 2042. The structure is 115 ft (35.1 m) long and 57 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-78 EB
CrossesLandsdown Trail
Location1 MI West of Rt 31
RouteInterstate 78
CountyHunterdon County
StateNew Jersey
Coordinates40.63192, -74.91264
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span38 ft (11.6 m)
Deck width57 ft (17.4 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,157 (2022)
Projected traffic66,082 by 2042
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-78 EB over Landsdown Trail built?

It was built in 1958, making it 67 years old in 2025.

What condition is I-78 EB over Landsdown Trail 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 I-78 EB over Landsdown Trail carry?

About 54,157 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is I-78 EB over Landsdown Trail?

The structure is 115 ft (35.1 m) long with a longest span of 38 ft (11.6 m) and a deck 57 ft wide.

Who owns I-78 EB over Landsdown Trail?

It is owned by the State Highway Agency.