I- 55
I- 55 in 0.6 M NE Of Il 83, DuPage County, Illinois received a condition grade of B (62/100). Built in 1959, the bridge carries 150K vehicles daily on I- 55 over Madison ST.
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- 55 is a 67-year-old bridge located 0.6 M NE Of Il 83 in DuPage County, Illinois. The bridge carries I- 55 over Madison ST with 6 traffic lanes, handling approximately 150K vehicles per day. Built in 1959 and reconstructed in 1996, the structure spans 52.4 meters.
The bridge received a Condition Grade of B (62/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 5/9 (fair), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I- 55 has a Condition Score of 62/100 (Grade B). Its deck is rated 7/9, superstructure 5/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I- 55 was built in 1959 and reconstructed in 1996, making it 67 years old. The average bridge age in the United States is 48 years.
I- 55 carries approximately 150K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 52.4 meters long and located on I- 55 in 0.6 M NE Of Il 83, DuPage County, Illinois.
No, I- 55 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- 55 is located 0.6 M NE Of Il 83 in DuPage County, Illinois. The bridge carries I- 55 over Madison ST. Its coordinates are 41.747261, -87.935128. It is maintained by State Highway Agency.
I- 55 carries I- 55 over Madison ST. The bridge is 52.4 meters long and was built in 1959, with reconstruction in 1996.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.