The experience of developing and providing driver route information systems

The authors relate their experience in developing several such systems over a period of 10 years. They were concerned first with improving the information given on direction signs; this was followed by the development of systems for providing route information for individual journeys. Subsequently these developed into an autonomous in-vehicle route guidance system, and systems which have allowed automobile clubs to automate the route information services provided to members. The authors are involved in the Autoguide system trial in London and look forward to using the two-way communication features of this system for improving traffic control.<>