Control system and method for controlling a vehicle or a component of a vehicle in which a maximum speed limit of a vehicle is activated by the driver and set by a GPS or a type of posted speed limit database. A user controlled means such as a button, knob, switch, touch pad, or voice allows driver to set the maximum allowable speed of the vehicle based on the roads posted speed limit, or manual input of the driver's choice. Once the speed limiter invention is engaged, the vehicle will not go past the posted speed limit regardless how much the accelerator pedal is depressed.