This paper describes the design and implementation of a common information infrastructure we have developed for various guidance systems to be used not only by the transportation disadvantaged including visuallyimpaired and wheelchair users but also by non-impaired users. By using the common infrastructure, we can build various guidance systems in a more cost-effective way. We have achieved this goal by developing a common access interface to user position data based on RFID technologies and a method to describe guidance data which can be used for various guidance systems. We have also developed prototypes of guidance systems based on this common information infrastructure.

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