Thanks for the feedback.  The DCC route seems like the right way to go.

I have purchased yet a third complete N scale set [Explorer] and a set of switch tracks, so I am anxious to get going on combining the three sets into a single layout on a 5 foot by 10 foot platform.

PS.  I was very pleased that the train has never jumped the tracks when passing through the switch tracks.  I was concerned that the tolerances on N scale would be a real problem [headache] but the train has passed over the switchtracks in both directions over 100 times now without a derailment.  Very impressive quality for very little money!
Thanks again,
Terry60523

I have two separate N scale train sets.  Both use EZ track and have identical power pack speed controllers.  I'm thinking about combining the two sets into a single larger layout and run both trains [Empire Builder] and [I forget] on the same large layout.
Question:  can I use two rerailer/power packs/speed controllers on a single large layout?  How do I adjust the speed of the two trains so one doesn't overtake the other?
You can see I'm a rookie at this hobby.

Any help would be greatly appreciated.   Thanks,