At present, in the Intelligent Transport Systems (ITS) field, research continues In-Vehicle Communication (VC), Inter-Vehicle Communication (IVC), Road-to-Vehicle Communication (RVC), etc. All information communications technology, especially radio-communications technology, was applied. For example, wireless 1394 is used in VC, millimeter-wave communication is used in IVC, and Radio on Fiber (ROF) communication technology is used in RVC. However, it is actually very difficult to design for and accommodate all of these systems. This research, to simplify a design, equipment, structure, cost down of production of VC, IVC, and RVC, utilizes a wireless Bluetooth technology system. In this paper, since the whole system is connected to the Internet backbone, provided some access point area, the Internet can be accessed from inside the vehicle and information, such as news and weather information, can be downloaded. It is also possible to know traffic information for each access point area by accessing a home memo y (data base server. © 2004, The Institute of Electrical Engineers of Japan. All rights reserved.