Skoda's Lane Assistant is a system intended to help the driver stay within the intended lane of travel. At speeds above 65km/h, a camera mounted by the rear view mirror at the top of the windscreen detects lane markings ahead of the vehicle. Information from the camera is combined with data about the car's speed and trajectory to calculate the time and distance before a lane marking would be crossed. When one or other of those parameters is less than a critical value, Lane Assistant intervenes by applying a gentle steering correction by means of the electric power steering fitted to the car. The amount of torque applied to the steering is small and can be easily overcome so that the driver remains in ultimate control of the vehicle at all times. The system is designed to assist the driver in cases where lane departure is unintentional. If the system is unable to correct the lane departure (because the curve is too sharp, for example), the system will additionally warn the driver through a steering wheel vibration. Lane Assistant senses when the lane marking is being crossed deliberately: corrective steering is suppressed if the driver uses the direction indicators or if a decisive steering action is detected by the power steering unit. The system also deactivates if no steering input has been detected from the driver for some time (indicating that the driver is relying on Lane Assistant to steer the car).