Highway Driving Assist (HDA) is a driving convenience feature that maintains the distance from the vehicle in front, on highways and automobile-only roads. It helps the driver keep the lane's center at the speed set by the driver. It recognizes lanes and vehicles using a front view camera and front radar, determines highways and automobile-only roads with navigation, and controls the distance between vehicles and lane maintenance. If the lane-keeping assist is canceled because the driver is not holding the steering wheel, the system activates driving speed control to limit the speed to under 60km/h.