US Bridges

Nj 18 Southbound over Wayside Road

Poor

Monmouth County, New Jersey · 0.11 MI N of Gsp NB · Structure no. 1323150

Built
1979
46 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
124 ft
1 main span
Daily traffic
20,788
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 18 Southbound over Wayside Road is a steel stringer/multi-beam or girder carrying Nj 18 Southbound over Wayside 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 20,788 vehicles a day, roughly 5% of them trucks, projected to reach 25,361 by 2043. The structure is 124 ft (37.8 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNj 18 Southbound
CrossesWayside Road
Location0.11 MI N of Gsp NB
RouteState Highway 18
CountyMonmouth County
StateNew Jersey
Coordinates40.28071, -74.08847
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be 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 rating91.1 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length124 ft (37.8 m)
Longest span120 ft (36.6 m)
Deck width58 ft (17.6 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,788 (2023)
Projected traffic25,361 by 2043
Trucks5%
Lanes on structure3
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$5.7 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 18 Southbound over Wayside Road built?

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

What condition is Nj 18 Southbound over Wayside Road in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

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

About 20,788 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj 18 Southbound over Wayside Road?

The structure is 124 ft (37.8 m) long with a longest span of 120 ft (36.6 m) and a deck 58 ft wide.

Who owns Nj 18 Southbound over Wayside Road?

It is owned by the State Highway Agency.