Once the vehicle has come to a complete stop by the curb and the applicant has allowed the vehicle to roll into position beside the curb, we mark the roll-back only for more than a reasonable distance for safety. However, it is not permissible for a vehicle to roll back when starting away from a curb or on an upgrade. If that happens, the examiner should assess a minor error for a roll-back of about 0.3 metres (one foot) and a major error for any distance that is unreasonable for safety.