Road vehicle guidance was picked up initially because the step to aero-space vehicles (the proper domain at the Department for Aerospace Engineering (LRT)) was considered to be too much for the beginning. This application domain has been so successful that it allowed to attract by far the major part of research money from industry and ministries over the next 1½ decades. A survey may be found in [Dic 95a] containing references to the various fields of applications of computer vision.