US Bridges

Nj 184 over US 9

Fair

Middlesex County, New Jersey · At JCT of Nj 184 & US 9 · Structure no. 1241150

Built
1938
87 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
103 ft
2 main spans
Daily traffic
29,667
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 184 over US 9 is a steel stringer/multi-beam or girder carrying Nj 184 over US 9 in Middlesex County, New Jersey. It was built in 1938, so it is 87 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 29,667 vehicles a day, roughly 4% of them trucks, projected to reach 36,236 by 2043. The structure is 103 ft (31.4 m) long and 55 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesNj 184
CrossesUS 9
LocationAt JCT of Nj 184 & US 9
RouteState Highway 184
CountyMiddlesex County
StateNew Jersey
Coordinates40.53454, -74.29736
Functional classUrban Other Principal 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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length103 ft (31.4 m)
Longest span49 ft (14.9 m)
Deck width55 ft (16.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,667 (2023)
Projected traffic36,236 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$825,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 184 over US 9 built?

It was built in 1938, making it 87 years old in 2025.

What condition is Nj 184 over US 9 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 April 2023.

How much traffic does Nj 184 over US 9 carry?

About 29,667 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nj 184 over US 9?

The structure is 103 ft (31.4 m) long with a longest span of 49 ft (14.9 m) and a deck 55 ft wide.

Who owns Nj 184 over US 9?

It is owned by the State Highway Agency.