Is the railroad line from Memphis, Tennessee, to Huntsville, Alabama, still open to freight trains?

The route is still in use today as part of the Norfolk Southern Railway line running between Memphis and Chattanooga, Tennessee. US 72 roughly follows the original route of the Memphis and Charleston between Memphis, Tennessee and Muscle Shoals, Alabama. From Muscle Shoals to Huntsville, Alabama Alt. US 72 follows the original Memphis and Charleston. US 72 follows the route again from Huntsville to Stevenson, Alabama. A branch line from Tullahoma, Tennessee to Sparta, Tennessee was accessed by the Nashville & Chattanooga RR at Tullahoma. The N&C became the Nashville, Chattanooga & St Louis Railway, then in 1957 merged into the Louisville & Nashville RR, now part of the CSX. The Sparta branch is operated by the Caney Fork & Western RR.