Building blocks for a safe rail way system based on roundabouts and right-hand drive. This includes loading and unload stations and a stacker that can support up to seven (7) trains. Note that loading station does not have chests as I prefer to park cars to function as three combined chests. Straights and U-turns (one exit roundabout) has alternatives without crossing. All blocks have roboports for a train-wide system. It is a good idea to separate train and base networks!