US Bridges

I-78 Westbound over US 202-206

Poor

Somerset County, New Jersey · 0.4 MI E of I-287 JCT · Structure no. 1817156

Built
1964
61 years old, rebuilt 1986
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
56,615
2023 count
Owner
State
State Highway Agency

About this bridge

I-78 Westbound over US 202-206 is a prestressed concrete stringer/multi-beam or girder carrying I-78 Westbound over US 202-206 in Somerset County, New Jersey. It was built in 1964 and reconstructed in 1986, so it is 61 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 3 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 56,615 vehicles a day, roughly 9% of them trucks, projected to reach 81,272 by 2043. The structure is 133 ft (40.5 m) long and 86 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesI-78 Westbound
CrossesUS 202-206
Location0.4 MI E of I-287 JCT
RouteInterstate 78
Coordinates40.64322, -74.63787
Functional classUrban Principal Arterial - Interstate

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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span59 ft (18 m)
Deck width86 ft (26.2 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,615 (2023)
Projected traffic81,272 by 2043
Trucks9%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$7,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-78 Westbound over US 202-206 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1986.

What condition is I-78 Westbound over US 202-206 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 I-78 Westbound over US 202-206 carry?

About 56,615 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-78 Westbound over US 202-206?

The structure is 133 ft (40.5 m) long with a longest span of 59 ft (18 m) and a deck 86 ft wide.

Who owns I-78 Westbound over US 202-206?

It is owned by the State Highway Agency.