Abstract: A speed control device is provided for a motor vehicle allowing the driver to maintain the vehicle at constant speed while still remaining full control with his foot over the acceleration and deceleration of the vehicle. The path of a foot pedal is subdivided into two sections, where the first section corresponds to an acceleration of the motor vehicle and where the second section corresponds to a deceleration of the motor vehicle. A snap-in detention device is provided at the junction point of the two sections such that a foot can rest with a force slightly above the weight of the foot against the foot pedal while the speed of the motor vehicle is maintained constant. The foot pedal is connected to a piston, which in turn is supported by a relatively soft spring. The soft spring is supported by a second piston, which in turn is supported by a harder spring resting against a casing wall.