Route information systems for motorists

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Abstract
At the present time, most motorists use road maps and road signs for route‐planning and navigation. However, it has been shown that drivers frequently are unable to plan the most efficient route between two places. In fact, an estimated £2500 million are wasted every year in Great Britain by motorists driving along inefficient routes. In an attempt to recoup some of this money several schemes have been devised for improving existing road signs and road maps. In addition, a number of experimental automated systems have been designed to aid route‐planning and navigation. This review will discuss firstly, the conventional systems used by motorists for route‐planning and navigation, and secondly, a number of the experimental systems which have been developed in a number of countries throughout the world, for example, Japan, Germany and the USA. Specific emphasis will be placed on the advantages and disadvantages of these systems compared to the conventional ones.

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