a method and system for the determining in advance of the travel corridor of a motor vehicle for an automatic system for establishing a safe tailing distance in which a signal corresponding to the speed is used to determine a turning radius of the motor vehicle , the travel corridor being determined from the turning radius . for the exact determination of the travel corridor of the motor vehicle , and in order sufficiently to take into consideration the travel dynamics of the motor vehicle , the speed of at least two wheels of the vehicle are measured and the yawing of the vehicle determined from the difference between the two wheel speeds .