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This work-in-progress article presents the research objectives of the (CIA)2-ITS workgroup of the Brazilian project consortium called (CIA)2. The workgroup is developing an architecture and protocols to integrate the heterogeneous networks and devices that compose a city-wide (or even nation-wide) Intelligent Transportation System (ITS). The ITS architecture will support networks of wireless sensors and actuators, smart vehicle communication as well as PCs and PDAs generating and requesting ITS-related information. This network will be open, thus gaining more functionality and data as users and the government “log into” the system.