US Bridges

Nj 18 over Raritan R Johnson George

Fair

Middlesex County, New Jersey · 1.13MI W of NJ18&27 JCT · Structure no. 1237155

Built
1980
45 years old
Condition
Fair
inspected April 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
1,049 ft
4 main spans
Daily traffic
42,055
2024 count
Owner
State
State Highway Agency

About this bridge

Nj 18 over Raritan R Johnson George is a steel continuous girder and floorbeam system carrying Nj 18 over Raritan R Johnson George in Middlesex County, New Jersey. It was built in 1980, so it is 45 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 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 42,055 vehicles a day, roughly 5% of them trucks, projected to reach 51,315 by 2044. The structure is 1,049 ft (319.7 m) long and 94 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNj 18
CrossesRaritan R Johnson George
Location1.13MI W of NJ18&27 JCT
RouteState Highway 18
Coordinates40.50731, -74.45696
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating75 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+1 approach)
Design loadHS 20
Structure length1,049 ft (319.7 m)
Longest span245 ft (74.7 m)
Deck width94 ft (28.5 m)
Roadway width81 ft (24.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,055 (2024)
Projected traffic51,315 by 2044
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Nj 18 over Raritan R Johnson George built?

It was built in 1980, making it 45 years old in 2025.

What condition is Nj 18 over Raritan R Johnson George 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 2024.

How much traffic does Nj 18 over Raritan R Johnson George carry?

About 42,055 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Nj 18 over Raritan R Johnson George?

The structure is 1,049 ft (319.7 m) long with a longest span of 245 ft (74.7 m) and a deck 94 ft wide.

Who owns Nj 18 over Raritan R Johnson George?

It is owned by the State Highway Agency.