blocks on a layout

I had a 3 line 1 underground with 27 switches just make sure that you have some long blocks on your main routes or you may be constantly setting blocks and switches. Mine was fun for awhile but got old pretty quick. I am not against using them just that you may want some runtime to just enjoy. I got up to 3 trains going at once in different directions and nearly had a heart attack! Hope you have fun with it.