Tennessee State Route 12 is a north-south highway in Montgomery County. This is a scenic way to Nashville from Clarksville, compared to U.S. Rt. 41A or Interstate 24. From Clarksville to the Kentucky/Tennessee State Line this is a unsigned route. TN St Rt 12 passes through the following town in Montgomery County. Fredonia Excell Clarksville TN St Rt 12 is multi-plexed in Montgomery County. BY-PASS U.S. Rt. 41A, at Clarksville. Tennessee State Route 76, at Clarksville. Tennessee State Route 13, at Clarksville. Tennessee State Route 48, at Clarksville. U.S. Rt. 79, at Clarksville. U.S. Rt. 41A, from Clarksville to the Kentucky/Tennessee State Line. TN St Rt 12 intersects the following highways in Montgomery County. BY-PASS U.S. Rt. 41A, at Clarksville. Tennessee State Route 76, at Clarksville. Tennessee State Route 13, at Clarksville. Tennessee State Route 48, at Clarksville. U.S. Rt. 79, at Clarksville. Tennessee State Route 48, at Clarksville. U.S. Rt. 41A, at Clarksville. BY-PASS U.S. Rt. 41A, at Clarksville. Tennessee State Route 13, at Clarksville. Tennessee State Route 112, at Clarksville. U.S. Rt. 79, at Clarksville. Tennessee State Route 76, at Clarksville. Tennessee State Route 374, at Clarksville. Tennessee State Route 236, near Outlaw.
SB TN St Rt 12 in Southern Montgomery County. A junction markers on SB BY-PASS U.S. Rt. 41A/TN St Rt 12; EB TN St Rt 76.
