Asphalt finisher

An asphalt finisher including a screed configured to level paving material while moving in a laying direction of the paving material, comprising:

• a telescopic screed cylinder configured to move a side frame, which defines a leveling limit of the screed, by extending and retracting upon supply of hydraulic oil;
• a switching valve capable of being switched between an open state where the hydraulic oil is supplied to the telescopic screed cylinder, and a closed state where supply of the hydraulic oil is stopped;
• a sensor configured to detect information concerning a current position of the side frame;
• and
• a controller configured to control a drive of the switching valve,
• wherein the controller is configured to:
• calculate a side frame target path, which specifies a trajectory of the side frame along the laying direction;
• calculate an extension and retraction speed of the telescopic screed cylinder based on a deviation between the side frame target path and the current position of the side frame detected by the sensor;
• and
• control the telescopic screed cylinder by switching the switching valve between the open state and the closed state based on the extension and retraction speed.