US Bridges

N. Gaston Avenue over I-287 Southbound

Fair

Somerset County, New Jersey · 1.64 MI North of US 22 · Structure no. 1813156

Built
1963
62 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
1,915
2023 count
Owner
State
State Highway Agency

About this bridge

N. Gaston Avenue over I-287 Southbound is a prestressed concrete stringer/multi-beam or girder carrying N. Gaston Avenue 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 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 1,915 vehicles a day, roughly 1% of them trucks, projected to reach 2,295 by 2043. The structure is 133 ft (40.5 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN. Gaston Avenue
CrossesI-287 Southbound
Location1.64 MI North of US 22
RouteCity Street 0
CountySomerset County
StateNew Jersey
Coordinates40.58134, -74.59804
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length133 ft (40.5 m)
Longest span63 ft (19.2 m)
Deck width45 ft (13.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,915 (2023)
Projected traffic2,295 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 N. Gaston Avenue over I-287 Southbound built?

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

What condition is N. Gaston Avenue 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 March 2023.

How much traffic does N. Gaston Avenue over I-287 Southbound carry?

About 1,915 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N. Gaston Avenue over I-287 Southbound?

The structure is 133 ft (40.5 m) long with a longest span of 63 ft (19.2 m) and a deck 45 ft wide.

Who owns N. Gaston Avenue over I-287 Southbound?

It is owned by the State Highway Agency.