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Advanced traveler information systems (ATISs) are continuously becoming key intelligent transportation system for disseminating valuable traveler information such as traffic, incident, and transit information. Developed countries such as the United States, Canada, Japan, U.K., Australia, and Germany have adopted ATIS expeditiously in comparison to developing countries that face considerable financial and framework constraints. Moreover, local traffic, roadway, signalization, demographic, topological, and social conditions in developing countries are quite different from those in developed countries. In this paper, a comprehensive framework comprising of system architecture, development methodology, and salient features of a developed ATIS for metropolitan cities in developing countries has been discussed. Development of proposed system is based on integration of two well-known information technologies, viz., geographic information systems and World Wide Web. Combination of these technologies can be used to develop an integrated ATIS that targets different types of travelers such as private vehicle owners, transit users, and casual outside visitors. [ABSTRACT FROM AUTHOR]