The branchline inside this dogbone has only a single connection with it at at the top center.18" curves are used throughout.. Note the curving spur to the right - it would make a fascinating path for trolleys or a line to an isolated industry.
For those who want more, you can add a curving system of switch-backs and sidings to the top. An imaginative model railroader will find superb industries and scenery - the potential is great for a truly astounding layout in both operation and visual effect.