The system electronically controlled a rear rack that was behind the rear wheels. At low speeds (up to 35 km/h), the rear wheels move in the opposite direction from the front wheels, aiding parking and U-turns by lowering the turning circle. Above these speeds, the rear wheels move in the same direction as the front, meaning control during high-speed maneuvers such as lane changes or cornering was improved. Either way, the turning angle of the rear wheels was slight at just 5°, a measurement Mazda determined to be optimally effective and natural to human sensitivity.