The Main Line Subdivision is a railroad line owned by CSX Transportation in the U.S. states of Kentucky and Tennessee.
The line runs from Louisville, Kentucky, to Nashville, Tennessee, for a total of 165.5 miles (266.3 km).
At its north end the line continues south from the Louisville Terminal Subdivision and at its south end the line continues south as the Nashville Terminal Subdivision.
You can help Wikipedia by expanding it.This article about transportation in Kentucky is a stub.
You can help Wikipedia by expanding it.This article about transportation in Tennessee is a stub.