US Bridges

Inman Ave (cr 602) over Gsp

Fair

Middlesex County, New Jersey · 2.23 MI North of Nj 27 · Structure no. 361341T

Built
1948
77 years old
Condition
Fair
inspected June 2023
Type
Frame
Concrete
Length
284 ft
2 main spans
Daily traffic
18,463
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Inman Ave (cr 602) over Gsp is a concrete frame carrying Inman Ave (cr 602) over Gsp in Middlesex County, New Jersey. It was built in 1948, so it is 77 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 18,463 vehicles a day, roughly 4% of them trucks, projected to reach 22,528 by 2043. The structure is 284 ft (86.6 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInman Ave (cr 602)
CrossesGsp
Location2.23 MI North of Nj 27
RouteCounty Highway 602
CountyMiddlesex County
StateNew Jersey
Coordinates40.59944, -74.31875
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span111 ft (33.8 m)
Deck width55 ft (16.8 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,463 (2023)
Projected traffic22,528 by 2043
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 Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Inman Ave (cr 602) over Gsp built?

It was built in 1948, making it 77 years old in 2025.

What condition is Inman Ave (cr 602) over Gsp 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 June 2023.

How much traffic does Inman Ave (cr 602) over Gsp carry?

About 18,463 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Inman Ave (cr 602) over Gsp?

The structure is 284 ft (86.6 m) long with a longest span of 111 ft (33.8 m) and a deck 55 ft wide.

Who owns Inman Ave (cr 602) over Gsp?

It is owned by the State Toll Authority.