Automatic audio signing. Volume 2: Review, analysis and design

Automati Audio Signing, also referred to as an 'automatic highway advisory radio system' (AHAR) provides appropriately equipped motor vehicles one way non commerical communications pertaining to traffic, road and weather conditions, travel advisories, directions, tourist information and other matters of interest to the traveling public. The automatic audio signing project reduces accidents by providing advance warning of hazardous traffic, weather and road conditions; saves the motorists' time and fuel, and reduces motorist irritation by improving traffic control and provides route diversion information when justified by traffic congestion or road blockage; and provides directions, locations of tourist facilities, descriptions of points of interest, and other messages intended to enhance the convenience and enjoyment of the traveling public.