Propulsion systems utilizing dual sources of power, namely, electricity sources in the nature of batteries, ultracapacitors, fuel cells, and similar means of electrical power storage and prime mover means for providing mechanical power including gasoline engines, diesel engines and fuel cells, primarily comprised of a generator which converts mechanical energy to electrical energy, a motor which converts electric energy into mechanical energy and propulsion compulsion systems in the nature of computer controlled electronics for controlling the flow of electricity between each generator to each electrical storage means and each motor, for use only in buses and trucks