This is a Gigabase-compatible blueprint book containing the building blocks of a rail system. Each rail blueprint contains a single track of rail and is half the width and height of a chunk. By mixing and matching blueprints, you can produce Gigabase-compatible designs for many different kinds of a rail systems including junctions, stations, and complex crossings with either left-hand or right-hand drive. This book does not include such a system, it is only meant to provide a small set of simple components.