I-75
I-75 in In Detroit, Wayne County, Michigan received a condition grade of B (74/100). Built in 1969, the bridge carries 152K vehicles daily on I-75 over Conrail RR.
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-75 is a 57-year-old bridge located In Detroit in Wayne County, Michigan. The bridge carries I-75 over Conrail RR with 10 traffic lanes, handling approximately 152K vehicles per day. Built in 1969 and reconstructed in 2003, the structure spans 67.1 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 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-75 has a Condition Score of 74/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-75 was built in 1969 and reconstructed in 2003, making it 57 years old. The average bridge age in the United States is 48 years.
I-75 carries approximately 152K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 67.1 meters long and located on I-75 in In Detroit, Wayne County, Michigan.
No, I-75 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-75 is located In Detroit in Wayne County, Michigan. The bridge carries I-75 over Conrail RR. Its coordinates are 42.414975, -83.084964. It is maintained by State Highway Agency.
I-75 carries I-75 over Conrail RR. The bridge is 67.1 meters long and was built in 1969, with reconstruction in 2003.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.