1. A programmed controller-implemented method of managing excessive slippage at a physical interface between a machine and a traveled surface, the method comprising: determining a track force, the track force being indicative of a propulsive force exerted by the machine on the traveled surface; determining a modeled slippage based, at least in part, upon the track force and a slippage model; and conditionally causing, by a programmed controller, a reduction of power output to propulsive drive components, by a motor, based upon a comparison, by the programmed controller, between the modeled slippage and a slippage limit.