I40
I40 in 1.0 M SW JCT Sr155&I40, Davidson County, Tennessee received a condition grade of C (56/100). Built in 1963, the bridge carries 131K vehicles daily on I40 over Mill Creek. It is classified as structurally deficient.
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
I40 is a 63-year-old bridge located 1.0 M SW JCT Sr155&I40 in Davidson County, Tennessee. The bridge carries I40 over Mill Creek with 10 traffic lanes, handling approximately 131K vehicles per day. Built in 1963 and reconstructed in 2008, the structure spans 77.5 meters.
The bridge received a Condition Grade of C (56/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 4/9 (poor). 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
I40 has a Condition Score of 56/100 (Grade C). Its deck is rated 6/9, superstructure 7/9, and substructure 4/9 on the NBI scale. The bridge is classified as structurally deficient.
I40 was built in 1963 and reconstructed in 2008, making it 63 years old. The average bridge age in the United States is 48 years.
I40 carries approximately 131K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 77.5 meters long and located on I40 in 1.0 M SW JCT Sr155&I40, Davidson County, Tennessee.
Yes, I40 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.
I40 is located 1.0 M SW JCT Sr155&I40 in Davidson County, Tennessee. The bridge carries I40 over Mill Creek. Its coordinates are 36.141333, -86.714600. It is maintained by State Highway Agency.
I40 carries I40 over Mill Creek. The bridge is 77.5 meters long and was built in 1963, with reconstruction in 2008.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.