sentences:  Heading north, the interstates come to an interchange with SR 62 (Western Avenue) about a mile later.About 1.5 miles later is a complicated interchange with I-275 southbound, the former route of I-75, and US 25W, where I-75 splits off.Leaving Knoxville, I-75 turns north, crossing several paralleling ridges of the Ridge and Valley Appalachians.