The present invention relates to vehicle guidance software for use with an agricultural vehicle having a guidance system. The software includes a processing portion (24) for generating a set of guidance indicators from a set of waypoints. The software further includes an adapting portion (26) for analyzing the guidance indicators produced by the processing portion (24) and determining whether the guidance indicators define a path that cannot be traversed by the vehicle due to its minimum turning radius. In the event that a path cannot be traversed by the vehicle the adaptive portion (26) generates a set of alternative guidance indicators that define a path that is traversable by the vehicle.