What Is DCC? Posted by Troy Simpkins on Dec 18, 2014 in Miscellaneous, Tony's Tips | Digital Command Control allows you to operate multiple locomotives independent of each other at the same time with varying speeds and directions on the same electrically controlled section of track. Adapted from “Digital Command Control: The Wave of the Future”, by Zana and A.J. Ireland. Adapted from “DCC Made Easy”, by Lionel Strang, with permission of Kalmbach Publishing Co..