Abstract: Autonomously drivable vehicles, selectively controllable by on-board and remote controllers and capable of travel on both conventional railways and conventional roadways by virtue of bimodal wheel combinations of roadways wheels and railway wheels, the latter of slightly smaller radius than that of the former, are disclosed. Vehicle direction and speed are alternatively and selectively controlled by (1) an onboard vehicle controller (autonomous and/or personal) or (2) a remote controller (as in a locomotive or central rail network management system). In railway mode, direction is controlled by track-following railway wheels and movement is propelled either by an on-board motor or motors or by locomotive force supplied by a connected vehicle such as a conventional locomotive.