Hydractive Suspension is a new automotive technology introduced by the French manufacturer Citroen in 1990. It describes a development of the 1954 Hydropneumatic suspension design using additional electronic sensors and driver control of suspension performance. The driver can make the suspension stiffen (sport mode) or ride in outstanding comfort (soft mode). Sensors in the steering, brakes, suspension, throttle pedal and gearbox feed information on the car's speed, acceleration, and road conditions to on-board computers. Where appropriate, and within milliseconds, these computers switch an extra pair of suspension spheres in or out of the circuit, to allow the car a smooth supple ride in normal circumstances, or greater roll resistance for better handling in corners. This development keeps Citroen in the forefront of suspension design, given the widespread goal in the auto industry of an active suspension system. All auto suspension is a compromise between comfort and handling. Auto manufacturers try to balance these aims and locate new technologies that offer more of both.