I am not N scale, but as I understand it, if you are using Kato Unitrack with the attached roadbed, then that's what you will have to use with it. If you are using just regular N scale track, then any other manufacturer's track (Atlas, Peco, Bachmann) will work as long as it doesn't have roadbed attached. There are ways to interconnect Unitrack with other track, but you'll have to wait for folks who use it to explain.