US Bridges

Old Post Road over Nj Turnpike

Fair

Middlesex County, New Jersey · 1.5 S of Int. 10 · Structure no. M086590

Built
1951
74 years old, rebuilt 1974
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
349 ft
5 main spans
Daily traffic
10,327
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Old Post Road over Nj Turnpike is a steel stringer/multi-beam or girder carrying Old Post Road over Nj Turnpike in Middlesex County, New Jersey. It was built in 1951 and reconstructed in 1974, so it is 74 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 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 10,327 vehicles a day, roughly 4% of them trucks, projected to reach 12,601 by 2043. The structure is 349 ft (106.4 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesOld Post Road
CrossesNj Turnpike
Location1.5 S of Int. 10
RouteCity Street 0
CountyMiddlesex County
StateNew Jersey
Coordinates40.51432, -74.36756
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length349 ft (106.4 m)
Longest span85 ft (25.9 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,327 (2023)
Projected traffic12,601 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$349,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Old Post Road over Nj Turnpike built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1974.

What condition is Old Post Road over Nj Turnpike 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 March 2023.

How much traffic does Old Post Road over Nj Turnpike carry?

About 10,327 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Old Post Road over Nj Turnpike?

The structure is 349 ft (106.4 m) long with a longest span of 85 ft (25.9 m) and a deck 38 ft wide.

Who owns Old Post Road over Nj Turnpike?

It is owned by the State Toll Authority.