I40
I40 in At I-40 & I-75 JCT, Knox County, Tennessee received a condition grade of B (78/100). Built in 1981, the bridge carries 183K vehicles daily on I40 over I40/I40-EB Rmp To I75 N.
I40 carries a B on the BridgeSafety Condition Score with 78/100. 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 1981, making it 45 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. I40 carries an average daily traffic count of 182,502 vehicles, with 6 lane(s) crossing I40/I40-EB Rmp To I75 N. 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 45-year-old bridge located At I-40 & I-75 JCT in Knox County, Tennessee. The bridge carries I40 over I40/I40-EB Rmp To I75 N with 6 traffic lanes, handling approximately 183K vehicles per day. Built in 1981, the structure spans 126.8 meters.
The bridge received a Condition Grade of B (78/100) 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 78/100 (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 1981, making it 45 years old. The average bridge age in the United States is 48 years.
I40 carries approximately 183K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 126.8 meters long and located on I40 in At I-40 & I-75 JCT, 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 At I-40 & I-75 JCT in Knox County, Tennessee. The bridge carries I40 over I40/I40-EB Rmp To I75 N. Its coordinates are 35.955683, -83.973053. It is maintained by State Highway Agency.
I40 carries I40 over I40/I40-EB Rmp To I75 N. The bridge is 126.8 meters long and was built in 1981.
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.