NS south of boyd station in Tenn

[habu]

I live close to the NS mainline between knoxville, tn and loudon, tn. Very frequently I see coal trains heading out of knoxville with 3 units on the head end and 2 on the rear. The head end has a crew in it but the rear end doesn't.

Question--are these rear end units remote powered,(i never see a crew in them) or are they there to eliminate switching at the destination etc....

[habu]

My question was answered via PM. Thank You.