"The Rail" is a colloquial term used for the mono-rail train system that connects all rings above terrain and subterranean. A monorail is a rail-based transportation system based on a single rail, which acts as its sole support and its guide-way. There are archways that hold the rail from above instead of the Terran monorail system with a single rail from below that the cars are attached too. The Rail system is a set of two cars with several passenger cars and a station that allows a change of the cars to storage cars and other needed ones. There is a South/North car and a East/West car.