A monorail beam is provided with a lower, upwardly-facing support surface, a lower, laterally-facing support surface and an upper, medially-facing support surface (relative to the support beam). Vehicles are hangingly supported, pendulum-like, from davit-like cantilevering arms of support trucks having wheels which run on or act against the base support surfaces so that they run along the side or sides of the beam. The beam may be elevated on columns, surface mounted, or depressed in tunnels. By preference, the vehicles' bodies are detachable from the trucks, and the heaviest air-conditioning components are mounted on the trucks rather than on the bodies. Power transmission and automatic control systems are described, as are switching systems and station facilities.