US Bridges

Cedar Brook Road over I-287 Southbound

Fair

Somerset County, New Jersey · 1.1 MI South of I-78 JCT · Structure no. 1814161

Built
1963
62 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
187 ft
4 main spans
Daily traffic
3,432
2023 count
Owner
State
State Highway Agency

About this bridge

Cedar Brook Road over I-287 Southbound is a prestressed concrete stringer/multi-beam or girder carrying Cedar Brook Road over I-287 Southbound in Somerset County, New Jersey. It was built in 1963, so it is 62 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 3,432 vehicles a day, roughly 1% of them trucks, projected to reach 4,119 by 2043. The structure is 187 ft (57 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCedar Brook Road
CrossesI-287 Southbound
Location1.1 MI South of I-78 JCT
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.62689, -74.64198
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 alignment7: Better than present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length187 ft (57 m)
Longest span62 ft (18.9 m)
Deck width45 ft (13.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,432 (2023)
Projected traffic4,119 by 2043
Trucks1%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cedar Brook Road over I-287 Southbound built?

It was built in 1963, making it 62 years old in 2025.

What condition is Cedar Brook Road over I-287 Southbound 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 February 2023.

How much traffic does Cedar Brook Road over I-287 Southbound carry?

About 3,432 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Cedar Brook Road over I-287 Southbound?

The structure is 187 ft (57 m) long with a longest span of 62 ft (18.9 m) and a deck 45 ft wide.

Who owns Cedar Brook Road over I-287 Southbound?

It is owned by the State Highway Agency.