It then separates again to serve Shelbyville, Winchester, and Tullahoma before rejoining the main route atop Monteagle Mountain.

[citation needed] U.S. 41A begins in Monteagle, and runs along the Marion–Grundy County line on its way to the Interstate 24 Exit 134 interchange.

At Winchester, US 41A turns northwestward, bypassing Tims Ford Lake, Woods Reservoir, and Arnold Engineering Development Center before entering Coffee County and the city of Tullahoma.

After crossing the Cumberland River via the Hydes Ferry Bridge, SR 12 leaves the concurrency in the Bordeaux neighborhood.

US 79/SR 76 leaves the concurrency, while US 41A/SR 12 continues northward, following the eastern boundary of the Fort Campbell Military Reservation to the Kentucky state line, where the Clarksville city limits border that of Oak Grove.

The state line also marks SR 12's northern/western terminus[6][7] Once US 41A enters Christian County in Oak Grove,[8] it is signed as US 41 Alternate.

Most of the road is a two-lane highway, occasionally widening to three lanes to accommodate truck traffic on hills.

Roads portal Media related to U.S. Route 41 Alternate (Monteagle, Tennessee–Hopkinsville, Kentucky) at Wikimedia Commons