US Bridges

S.Main St.(cr 531) over US 1

Fair

Middlesex County, New Jersey · 0.3 MI South of I-287 · Structure no. 1203154

Built
1963
62 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
225 ft
4 main spans
Daily traffic
16,945
2024 count
Owner
State
State Highway Agency

About this bridge

S.Main St.(cr 531) over US 1 is a prestressed concrete stringer/multi-beam or girder carrying S.Main St.(cr 531) over US 1 in Middlesex 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 16,945 vehicles a day, roughly 4% of them trucks, projected to reach 20,690 by 2044. The structure is 225 ft (68.6 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS.Main St.(cr 531)
CrossesUS 1
Location0.3 MI South of I-287
RouteCounty Highway 531
CountyMiddlesex County
StateNew Jersey
Coordinates40.52556, -74.35856
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 inspectionAugust 2024
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 alignment6: Equal to present minimum criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span86 ft (26.2 m)
Deck width60 ft (18.4 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,945 (2024)
Projected traffic20,690 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 S.Main St.(cr 531) over US 1 built?

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

What condition is S.Main St.(cr 531) over US 1 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 August 2024.

How much traffic does S.Main St.(cr 531) over US 1 carry?

About 16,945 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is S.Main St.(cr 531) over US 1?

The structure is 225 ft (68.6 m) long with a longest span of 86 ft (26.2 m) and a deck 60 ft wide.

Who owns S.Main St.(cr 531) over US 1?

It is owned by the State Highway Agency.