US Bridges

Liberty Corner Rd. over I-287 SB

Fair

Somerset County, New Jersey · 3.23 MI North of I78 · Structure no. 1815160

Built
1964
61 years old, rebuilt 1994
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
146 ft
3 main spans
Daily traffic
4,266
2023 count
Owner
State
State Highway Agency

About this bridge

Liberty Corner Rd. over I-287 SB is a prestressed concrete stringer/multi-beam or girder carrying Liberty Corner Rd. over I-287 SB in Somerset County, New Jersey. It was built in 1964 and reconstructed in 1994, 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 5 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 146 ft (44.5 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLiberty Corner Rd.
CrossesI-287 SB
Location3.23 MI North of I78
RouteCounty Highway 512
CountySomerset County
StateNew Jersey
Coordinates40.67353, -74.61304
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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 rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span70 ft (21.3 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 closed1.2 mi (2 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$38,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Liberty Corner Rd. over I-287 SB built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1994.

What condition is Liberty Corner Rd. over I-287 SB 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 SB carry?

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

How long is Liberty Corner Rd. over I-287 SB?

The structure is 146 ft (44.5 m) long with a longest span of 70 ft (21.3 m) and a deck 40 ft wide.

Who owns Liberty Corner Rd. over I-287 SB?

It is owned by the State Highway Agency.