A method and apparatus for automatically controlling ground speed of a work vehicle. The apparatus includes a speed sensor generating a vehicle speed signal, the speed sensor operatively connected to a controller. A traction device angle sensor generates an angle signal which represents an angle of the traction device with respect to an axis of the work vehicle, wherein the traction device angle sensor operatively connected to the controller. A vehicle guidance system is configured to generate a vehicle position signal, wherein the controller determines the ground speed of the vehicle based on at least one of: i) a tracking error of the vehicle relative to the vehicle position signal； ii) a planned curved vehicle path； iii) a planned location of the vehicle within a defined portion of a field； and iv) a planned path segment and an associated change in direction of travel of the work vehicle.
