I40
I40 in .8 M SE Of Sr1, Knox County, Tennessee received a condition grade of B (69/100). Built in 1959, the bridge carries 180K vehicles daily on I40 over I40 / Old West Hills I/C.
I40 carries a B on the BridgeSafety Condition Score with 69/100. 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 1959 and is now 67 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. I40 carries an average daily traffic count of 179,856 vehicles, with 6 lane(s) crossing I40 / Old West Hills I/C. 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
I40 is a 67-year-old bridge located .8 M SE Of Sr1 in Knox County, Tennessee. The bridge carries I40 over I40 / Old West Hills I/C with 6 traffic lanes, handling approximately 180K vehicles per day. Built in 1959 and reconstructed in 2002, the structure spans 45 meters.
The bridge received a Condition Grade of B (69/100) 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
I40 has a Condition Score of 69/100 (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.
I40 was built in 1959 and reconstructed in 2002, making it 67 years old. The average bridge age in the United States is 48 years.
I40 carries approximately 180K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 45 meters long and located on I40 in .8 M SE Of Sr1, Knox County, Tennessee.
No, I40 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I40 is located .8 M SE Of Sr1 in Knox County, Tennessee. The bridge carries I40 over I40 / Old West Hills I/C. Its coordinates are 35.929169, -84.039719. It is maintained by State Highway Agency.
I40 carries I40 over I40 / Old West Hills I/C. The bridge is 45 meters long and was built in 1959, with reconstruction in 2002.
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.