I-78
I-78 in 0.25 MI East Of Gsp JCT, Union County, New Jersey received a condition grade of C (52/100). Built in 1976, the bridge carries 188K vehicles daily on I-78 over Conrail RR (Abandoned). It is classified as structurally deficient.
I-78 carries a C on the BridgeSafety Condition Score with 52/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
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 188,000 vehicles, with 10 lane(s) crossing Conrail RR (Abandoned). 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 0.25 MI East Of Gsp JCT in Union County, New Jersey. The bridge carries I-78 over Conrail RR (Abandoned) with 10 traffic lanes, handling approximately 188K vehicles per day. Built in 1976, the structure spans 9.1 meters.
The bridge received a Condition Grade of C (52/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 7/9 (good), and substructure 7/9 (good). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-78 has a Condition Score of 52/100 (Grade C). Its deck is rated 0/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is classified as structurally deficient.
I-78 was built in 1976, making it 50 years old. The average bridge age in the United States is 48 years.
I-78 carries approximately 188K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 9.1 meters long and located on I-78 in 0.25 MI East Of Gsp JCT, Union County, New Jersey.
Yes, I-78 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
I-78 is located 0.25 MI East Of Gsp JCT in Union County, New Jersey. The bridge carries I-78 over Conrail RR (Abandoned). Its coordinates are 40.704911, -74.239639. It is maintained by State Highway Agency.
I-78 carries I-78 over Conrail RR (Abandoned). The bridge is 9.1 meters long and was built in 1976.
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.