Originally Posted by Dr Rudi View Post

At lego scale to control trains by gps you'd need to send a lego scale earth up into space, then have lego scale gps satellites orbiting said lego earth and being held in place by a lego earth scaled gravitational pull, which would then only really be possible with a lego scaled solar system.

All up to make that happen, it's going to be a lot of lego.

Don't let your dreams be dreams.