I55 NB
I55 NB in .1 MI S Of I240 JCT, Shelby County, Tennessee received a condition grade of B (65/100). Built in 1958, the bridge carries 132K vehicles daily on I55 NB over I240 EB Ramp.
I55 NB carries a B on the BridgeSafety Condition Score with 65/100. 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 1958 and is now 68 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. I55 NB carries an average daily traffic count of 131,916 vehicles, with 4 lane(s) crossing I240 EB Ramp. 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
I55 NB is a 68-year-old bridge located .1 MI S Of I240 JCT in Shelby County, Tennessee. The bridge carries I55 NB over I240 EB Ramp with 4 traffic lanes, handling approximately 132K vehicles per day. Built in 1958 and reconstructed in 1998, the structure spans 39.2 meters.
The bridge received a Condition Grade of B (65/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I55 NB has a Condition Score of 65/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I55 NB was built in 1958 and reconstructed in 1998, making it 68 years old. The average bridge age in the United States is 48 years.
I55 NB carries approximately 132K vehicles per day (average daily traffic). The bridge has 4 traffic lanes. It is 39.2 meters long and located on I55 NB in .1 MI S Of I240 JCT, Shelby County, Tennessee.
No, I55 NB is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I55 NB is located .1 MI S Of I240 JCT in Shelby County, Tennessee. The bridge carries I55 NB over I240 EB Ramp. Its coordinates are 35.069306, -90.025581. It is maintained by State Highway Agency.
I55 NB carries I55 NB over I240 EB Ramp. The bridge is 39.2 meters long and was built in 1958, with reconstruction in 1998.
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.