US Bridges

Nj 18 Southbound over Squankum Road

Fair

Monmouth County, New Jersey · 0.72 Miles North of CR-38 · Structure no. 1323156

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
185 ft
3 main spans
Daily traffic
18,965
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 18 Southbound over Squankum Road is a steel stringer/multi-beam or girder carrying Nj 18 Southbound over Squankum Road in Monmouth County, New Jersey. It was built in 1979, so it is 46 years old, younger 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 18,965 vehicles a day, roughly 5% of them trucks, projected to reach 22,758 by 2043. The structure is 185 ft (56.4 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 18 Southbound
CrossesSquankum Road
Location0.72 Miles North of CR-38
RouteState Highway 18
CountyMonmouth County
StateNew Jersey
Coordinates40.28395, -74.10236
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating67 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span97 ft (29.6 m)
Deck width48 ft (14.7 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,965 (2023)
Projected traffic22,758 by 2043
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Nj 18 Southbound over Squankum Road built?

It was built in 1979, making it 46 years old in 2025.

What condition is Nj 18 Southbound over Squankum 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 May 2023.

How much traffic does Nj 18 Southbound over Squankum Road carry?

About 18,965 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj 18 Southbound over Squankum Road?

The structure is 185 ft (56.4 m) long with a longest span of 97 ft (29.6 m) and a deck 48 ft wide.

Who owns Nj 18 Southbound over Squankum Road?

It is owned by the State Highway Agency.