US Bridges

Milltown Road over Nj 18

Poor

Middlesex County, New Jersey · .28 Miles N. of 535 JCT · Structure no. 1212152

Built
1963
62 years old
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
2 main spans
Daily traffic
16,163
2023 count
Owner
State
State Highway Agency

About this bridge

Milltown Road over Nj 18 is a steel stringer/multi-beam or girder carrying Milltown Road over Nj 18 in Middlesex County, New Jersey. It was built in 1963, so it is 62 years old, older 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 16,163 vehicles a day, roughly 4% of them trucks, projected to reach 19,396 by 2043. The structure is 163 ft (49.7 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMilltown Road
CrossesNj 18
Location.28 Miles N. of 535 JCT
RouteCounty Highway 606
CountyMiddlesex County
StateNew Jersey
Coordinates40.44224, -74.39486
Functional classUrban Minor Arterial

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span78 ft (23.8 m)
Deck width65 ft (19.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,163 (2023)
Projected traffic19,396 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9.4 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Milltown Road over Nj 18 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Milltown Road over Nj 18 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 March 2023.

How much traffic does Milltown Road over Nj 18 carry?

About 16,163 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Milltown Road over Nj 18?

The structure is 163 ft (49.7 m) long with a longest span of 78 ft (23.8 m) and a deck 65 ft wide.

Who owns Milltown Road over Nj 18?

It is owned by the State Highway Agency.