US Bridges

Liberty Corner RD over I-287 Northbound

Fair

Somerset County, New Jersey · 1.6 MI East of US 202 · Structure no. 1815159

Built
1964
61 years old, rebuilt 1997
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
144 ft
1 main span
Daily traffic
4,266
2023 count
Owner
State
State Highway Agency

About this bridge

Liberty Corner RD over I-287 Northbound is a steel stringer/multi-beam or girder carrying Liberty Corner RD over I-287 Northbound in Somerset County, New Jersey. It was built in 1964 and reconstructed in 1997, so it is 61 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 4,266 vehicles a day, roughly 3% of them trucks, projected to reach 5,119 by 2043. The structure is 144 ft (43.9 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLiberty Corner RD
CrossesI-287 Northbound
Location1.6 MI East of US 202
RouteCounty Highway 512
CountySomerset County
StateNew Jersey
Coordinates40.67317, -74.61246
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 rating56 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span102 ft (31.1 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,266 (2023)
Projected traffic5,119 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$69,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Liberty Corner RD over I-287 Northbound built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1997.

What condition is Liberty Corner RD over I-287 Northbound 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 May 2023.

How much traffic does Liberty Corner RD over I-287 Northbound carry?

About 4,266 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Liberty Corner RD over I-287 Northbound?

The structure is 144 ft (43.9 m) long with a longest span of 102 ft (31.1 m) and a deck 40 ft wide.

Who owns Liberty Corner RD over I-287 Northbound?

It is owned by the State Highway Agency.