Abstract: A method and apparatus for producing useful work by utilizing the weight of moving traffic by incorporating in a roadway or traffic-way a readily deformable chamber which is filled with a fluid arranged so that the weight of a vehicle in passing thereof affects a displacement of the fluid therein. The energy of the displaced fluid in turn is translated into mechanical or electrical energy.

Abstract: A method and apparatus for producing useful work by a traffic-way or roadway having a moveable portion that can be readily displaced by the weight of traffic passing thereover, and translating the displacement of the moveable portion into useful work; e.g., to effect the drive of an electric generator or a drive shaft. This is attained essentially by interposing a transmission between the moveable roadway portion and work producing drive which will effect a unidirectional rotation or actuation of a work producing drive as the moveable roadway is moved between a loaded and unloaded position.