A method for using an arbitrary shape 2-D poly-point path for an automatic vehicle guidance comprising the steps of: (A) determining a set of 2-D reference points; (B) selecting a set of 2-D interpolating curves to fit the set of 2-D reference points, wherein each 2-D interpolation curve connects a pair of 2-D reference points, and wherein each set of 2-D interpolation curves comprises a continuous 2-D poly-point path; and (C) calculating a steering angle to guide the vehicle along the continuous 2-D poly-point path.