US Bridges

Main ST (cr 531) over I-287

Fair

Middlesex County, New Jersey · .15 MI North of US 1 Jct. · Structure no. 1230154

Built
1962
63 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
252 ft
4 main spans
Daily traffic
16,424
2023 count
Owner
State
State Highway Agency

About this bridge

Main ST (cr 531) over I-287 is a steel stringer/multi-beam or girder carrying Main ST (cr 531) over I-287 in Middlesex County, New Jersey. It was built in 1962, so it is 63 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 16,424 vehicles a day, roughly 4% of them trucks, projected to reach 20,040 by 2043. The structure is 252 ft (76.8 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMain ST (cr 531)
CrossesI-287
Location.15 MI North of US 1 Jct.
RouteCounty Highway 531
CountyMiddlesex County
StateNew Jersey
Coordinates40.52742, -74.35845
Functional classUrban Minor Arterial

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 inspectionJuly 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 alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length252 ft (76.8 m)
Longest span95 ft (29 m)
Deck width60 ft (18.4 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,424 (2023)
Projected traffic20,040 by 2043
Trucks4%
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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$51,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Main ST (cr 531) over I-287 built?

It was built in 1962, making it 63 years old in 2025.

What condition is Main ST (cr 531) over I-287 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 July 2023.

How much traffic does Main ST (cr 531) over I-287 carry?

About 16,424 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Main ST (cr 531) over I-287?

The structure is 252 ft (76.8 m) long with a longest span of 95 ft (29 m) and a deck 60 ft wide.

Who owns Main ST (cr 531) over I-287?

It is owned by the State Highway Agency.