US Bridges

Garden ST Pkwy Sbo over Ernston Road

Fair

Middlesex County, New Jersey · 2.5 MI S of Raritan Toll · Structure no. 361235U

Built
1954
71 years old, rebuilt 1972
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
124 ft
3 main spans
Daily traffic
48,257
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Garden ST Pkwy Sbo over Ernston Road is a steel stringer/multi-beam or girder carrying Garden ST Pkwy Sbo over Ernston Road in Middlesex County, New Jersey. It was built in 1954 and reconstructed in 1972, so it is 71 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 48,257 vehicles a day, roughly 1% of them trucks, projected to reach 79,186 by 2043. The structure is 124 ft (37.8 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGarden ST Pkwy Sbo
CrossesErnston Road
Location2.5 MI S of Raritan Toll
CountyMiddlesex County
StateNew Jersey
Coordinates40.46088, -74.28105
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length124 ft (37.8 m)
Longest span52 ft (15.8 m)
Deck width66 ft (20.1 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,257 (2023)
Projected traffic79,186 by 2043
Trucks1%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 Garden ST Pkwy Sbo over Ernston Road built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1972.

What condition is Garden ST Pkwy Sbo over Ernston Road 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 February 2023.

How much traffic does Garden ST Pkwy Sbo over Ernston Road carry?

About 48,257 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Garden ST Pkwy Sbo over Ernston Road?

The structure is 124 ft (37.8 m) long with a longest span of 52 ft (15.8 m) and a deck 66 ft wide.

Who owns Garden ST Pkwy Sbo over Ernston Road?

It is owned by the State Toll Authority.