US Bridges

I-287 over Main ST (cr 533)

Fair

Somerset County, New Jersey · 0.6 MI South of Nj 28 · Structure no. 1812160

Built
1960
65 years old, rebuilt 1986
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
218 ft
3 main spans
Daily traffic
138,097
2023 count
Owner
State
State Highway Agency

About this bridge

I-287 over Main ST (cr 533) is a steel stringer/multi-beam or girder carrying I-287 over Main ST (cr 533) in Somerset County, New Jersey. It was built in 1960 and reconstructed in 1986, so it is 65 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 138,097 vehicles a day, roughly 9% of them trucks, projected to reach 207,146 by 2043. The structure is 218 ft (66.4 m) long and 110 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-287
CrossesMain ST (cr 533)
Location0.6 MI South of Nj 28
RouteInterstate 287
CountySomerset County
StateNew Jersey
Coordinates40.56094, -74.54941
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length218 ft (66.4 m)
Longest span99 ft (30.2 m)
Deck width110 ft (33.5 m)
Roadway width105 ft (31.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic138,097 (2023)
Projected traffic207,146 by 2043
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-287 over Main ST (cr 533) built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1986.

What condition is I-287 over Main ST (cr 533) 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 2023.

How much traffic does I-287 over Main ST (cr 533) carry?

About 138,097 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-287 over Main ST (cr 533)?

The structure is 218 ft (66.4 m) long with a longest span of 99 ft (30.2 m) and a deck 110 ft wide.

Who owns I-287 over Main ST (cr 533)?

It is owned by the State Highway Agency.