US Bridges

Garden ST Pkwy Nbo over Ernston Road

Fair

Middlesex County, New Jersey · 2.5 MI S of Raritan Toll · Structure no. 361236O

Built
1954
71 years old, rebuilt 1972
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
123 ft
3 main spans
Daily traffic
46,622
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Garden ST Pkwy Nbo over Ernston Road is a steel stringer/multi-beam or girder carrying Garden ST Pkwy Nbo 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 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 46,622 vehicles a day, roughly 1% of them trucks, projected to reach 70,626 by 2043. The structure is 123 ft (37.5 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGarden ST Pkwy Nbo
CrossesErnston Road
Location2.5 MI S of Raritan Toll
CountyMiddlesex County
StateNew Jersey
Coordinates40.46145, -74.29708
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length123 ft (37.5 m)
Longest span52 ft (15.8 m)
Deck width69 ft (20.9 m)
Roadway width66 ft (20 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,622 (2023)
Projected traffic70,626 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 Nbo 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 Nbo 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 Nbo over Ernston Road carry?

About 46,622 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Garden ST Pkwy Nbo over Ernston Road?

The structure is 123 ft (37.5 m) long with a longest span of 52 ft (15.8 m) and a deck 69 ft wide.

Who owns Garden ST Pkwy Nbo over Ernston Road?

It is owned by the State Toll Authority.