US Bridges

Nj 18 Northbound over Hamilton Road

Good

Monmouth County, New Jersey · 0.61 Miles S. of Gs Pky · Structure no. 1323153

Built
1979
46 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
112 ft
1 main span
Daily traffic
21,438
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 18 Northbound over Hamilton Road is a steel stringer/multi-beam or girder carrying Nj 18 Northbound over Hamilton 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 21,438 vehicles a day, roughly 5% of them trucks, projected to reach 26,159 by 2043. The structure is 112 ft (34.1 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNj 18 Northbound
CrossesHamilton Road
Location0.61 Miles S. of Gs Pky
RouteState Highway 18
Coordinates40.28321, -74.09733
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating66 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span108 ft (32.9 m)
Deck width48 ft (14.7 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,438 (2023)
Projected traffic26,159 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 Northbound over Hamilton Road built?

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

What condition is Nj 18 Northbound over Hamilton Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Nj 18 Northbound over Hamilton Road carry?

About 21,438 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj 18 Northbound over Hamilton Road?

The structure is 112 ft (34.1 m) long with a longest span of 108 ft (32.9 m) and a deck 48 ft wide.

Who owns Nj 18 Northbound over Hamilton Road?

It is owned by the State Highway Agency.