US Bridges

Nj 27 over Gsp

Fair

Middlesex County, New Jersey · JCT of Nj 27 & Gsp · Structure no. 361319T

Built
1948
77 years old
Condition
Fair
inspected June 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
161 ft
2 main spans
Daily traffic
22,610
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nj 27 over Gsp is a steel continuous girder and floorbeam system carrying Nj 27 over Gsp in Middlesex County, New Jersey. It was built in 1948, so it is 77 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 22,610 vehicles a day, roughly 4% of them trucks, projected to reach 27,590 by 2043. The structure is 161 ft (49.1 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNj 27
CrossesGsp
LocationJCT of Nj 27 & Gsp
RouteState Highway 27
Coordinates40.57007, -74.32773
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length161 ft (49.1 m)
Longest span78 ft (23.8 m)
Deck width60 ft (18.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,610 (2023)
Projected traffic27,590 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 27 over Gsp built?

It was built in 1948, making it 77 years old in 2025.

What condition is Nj 27 over Gsp 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 June 2023.

How much traffic does Nj 27 over Gsp carry?

About 22,610 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nj 27 over Gsp?

The structure is 161 ft (49.1 m) long with a longest span of 78 ft (23.8 m) and a deck 60 ft wide.

Who owns Nj 27 over Gsp?

It is owned by the State Toll Authority.