The author first draws on his experiences in the Royal Air Force and also teaching in universities, in Cambridge, England; M.I.T.; Wales; France, and Holland, to describe a number of interesting technical devices, some of which have yet to be marketed, possibly on account of economic obstacles. The second part is devoted to a discussion of some of the more recent test facilities installed in the laboratories and on the Proving Ground of the Motor Industry Research Association. The paper ends with a consideration of some of the outstanding basic problems of vehicle research.