Metro System Map (Trains/Trams/Bathysheres/etc...) Overall (Big) Rapture Map Simplest mechanism (lowest maintenance and highest reliability) is a time-tested conventional railroad style 'bridge' turntable (except with a overhead monorail support structure). The Turntable rotates allowing reversing the heading of the traincars and matching up to a large number of tracks (that radiate from its center) the traincar can be transfered to. Diagram shows ~50ft 12 track version (if the radius was increase to ~70ft then it could fit 16 tracks) Metro Cable line Turns (Lighthouse to Welcome Center) : . . .