A method for directing a vehicle from a fleet of N vehicles, numbered n=1, 2, . . . , N(N.gtoreq.2), to respond to a call for assistance received at a central processing station that communicates with a communications unit on each of these vehicles. The central station receives information by radio wave...http://www.google.fr/patents/US5493694?utm_source=gb-gplus-shareBrevet US5493694 - Fast response system for a fleet of vehicles
