US Bridges

I-287 Ramp "a" over I-287 Ramp "b"

Fair

Somerset County, New Jersey · At I-287 Exit 10 · Structure no. 1812150

Built
1960
65 years old, rebuilt 2010
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
3 main spans
Daily traffic
16,455
2023 count
Owner
State
State Highway Agency

About this bridge

I-287 Ramp "a" over I-287 Ramp "b" is a steel stringer/multi-beam or girder carrying I-287 Ramp "a" over I-287 Ramp "b" in Somerset County, New Jersey. It was built in 1960 and reconstructed in 2010, 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 16,455 vehicles a day, roughly 9% of them trucks, projected to reach 19,745 by 2043. The structure is 105 ft (32 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-287 Ramp "a"
CrossesI-287 Ramp "b"
LocationAt I-287 Exit 10
RouteInterstate 287
CountySomerset County
StateNew Jersey
Coordinates40.53976, -74.51449
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating106.8 US tons
Inventory rating93.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length105 ft (32 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,455 (2023)
Projected traffic19,745 by 2043
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-287 Ramp "a" over I-287 Ramp "b" built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2010.

What condition is I-287 Ramp "a" over I-287 Ramp "b" 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 June 2023.

How much traffic does I-287 Ramp "a" over I-287 Ramp "b" carry?

About 16,455 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-287 Ramp "a" over I-287 Ramp "b"?

The structure is 105 ft (32 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns I-287 Ramp "a" over I-287 Ramp "b"?

It is owned by the State Highway Agency.