My son likes his Lego Duplo train a lot, and we bought all the modern Duplo Train kits out there.
So now we have 4 switches, and though my son doesn't yet get the challenge of preventing train from colliding, I do, and it's hard to manage even four of those switches when there are two trains.
My goal is to build a remotely controlled train switch - probably based on ESP8266/ESP12.
So there should 4 terminals with servos and a central "console" with pushbuttons for every train switch.