GSP
GSP in 1.35 MI South Of Nj 27, Middlesex County, New Jersey received a condition grade of B (60/100). Built in 1948, the bridge carries 169K vehicles daily on GSP over US Route 1.
GSP carries a B on the BridgeSafety Condition Score with 60/100. 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 1948 and is now 78 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. GSP carries an average daily traffic count of 168,525 vehicles, with 12 lane(s) crossing US Route 1. The owning agency is State Toll Authority; 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
GSP is a 78-year-old bridge located 1.35 MI South Of Nj 27 in Middlesex County, New Jersey. The bridge carries GSP over US Route 1 with 12 traffic lanes, handling approximately 169K vehicles per day. Built in 1948 and reconstructed in 2015, the structure spans 32.6 meters.
The bridge received a Condition Grade of B (60/100) based on Federal Highway Administration inspection data. Its deck is rated 8/9 (good), superstructure 6/9 (fair), and substructure 6/9 (fair).
This bridge is owned and maintained by State Toll Authority.
Location Map
Frequently Asked Questions
GSP has a Condition Score of 60/100 (Grade B). Its deck is rated 8/9, superstructure 6/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
GSP was built in 1948 and reconstructed in 2015, making it 78 years old. The average bridge age in the United States is 48 years.
GSP carries approximately 169K vehicles per day (average daily traffic). The bridge has 12 traffic lanes. It is 32.6 meters long and located on GSP in 1.35 MI South Of Nj 27, Middlesex County, New Jersey.
No, GSP is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
GSP is located 1.35 MI South Of Nj 27 in Middlesex County, New Jersey. The bridge carries GSP over US Route 1. Its coordinates are 40.552708, -74.317181. It is maintained by State Toll Authority.
GSP carries GSP over US Route 1. The bridge is 32.6 meters long and was built in 1948, with reconstruction in 2015.
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.