I-78
I-78 in 5.51 MI West Of I-95, Union County, New Jersey received a condition grade of B (74/100). Built in 1976, the bridge carries 237K vehicles daily on I-78 over Garden State Parkway.
I-78 carries a B on the BridgeSafety Condition Score with 74/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1976 and is now 50 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I-78 carries an average daily traffic count of 236,895 vehicles, with 12 lane(s) crossing Garden State Parkway. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I-78 is a 50-year-old bridge located 5.51 MI West Of I-95 in Union County, New Jersey. The bridge carries I-78 over Garden State Parkway with 12 traffic lanes, handling approximately 237K vehicles per day. Built in 1976 and reconstructed in 2010, the structure spans 79.2 meters.
The bridge received a Condition Grade of B (74/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-78 has a Condition Score of 74/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-78 was built in 1976 and reconstructed in 2010, making it 50 years old. The average bridge age in the United States is 48 years.
I-78 carries approximately 237K vehicles per day (average daily traffic). The bridge has 12 traffic lanes. It is 79.2 meters long and located on I-78 in 5.51 MI West Of I-95, Union County, New Jersey.
No, I-78 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I-78 is located 5.51 MI West Of I-95 in Union County, New Jersey. The bridge carries I-78 over Garden State Parkway. Its coordinates are 40.705131, -74.246361. It is maintained by State Highway Agency.
I-78 carries I-78 over Garden State Parkway. The bridge is 79.2 meters long and was built in 1976, with reconstruction in 2010.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.