US Bridges

Nj Rt 18 (hoes Ln) over Ambrose Brook

Fair

Middlesex County, New Jersey · 0.64 Mi. South of RT.287 · Structure no. 122B174

Built
1980
45 years old, rebuilt 2015
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
26,163
2023 count
Owner
State
State Highway Agency

About this bridge

Nj Rt 18 (hoes Ln) over Ambrose Brook is a prestressed concrete box beam or girders - multiple carrying Nj Rt 18 (hoes Ln) over Ambrose Brook in Middlesex County, New Jersey. It was built in 1980 and reconstructed in 2015, 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 26,163 vehicles a day, roughly 4% of them trucks, projected to reach 31,924 by 2043. The structure is 53 ft (16.2 m) long and 92 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNj Rt 18 (hoes Ln)
CrossesAmbrose Brook
Location0.64 Mi. South of RT.287
RouteState Highway 18
CountyMiddlesex County
StateNew Jersey
Coordinates40.54856, -74.47572
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating51.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length53 ft (16.2 m)
Longest span48 ft (14.6 m)
Deck width92 ft (28.1 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,163 (2023)
Projected traffic31,924 by 2043
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj Rt 18 (hoes Ln) over Ambrose Brook built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2015.

What condition is Nj Rt 18 (hoes Ln) over Ambrose Brook 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 Rt 18 (hoes Ln) over Ambrose Brook carry?

About 26,163 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nj Rt 18 (hoes Ln) over Ambrose Brook?

The structure is 53 ft (16.2 m) long with a longest span of 48 ft (14.6 m) and a deck 92 ft wide.

Who owns Nj Rt 18 (hoes Ln) over Ambrose Brook?

It is owned by the State Highway Agency.