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This paper presents wireless multimedia communications with the intelligent transport system (ITS). First, the new concept of "environment communication" is introduced which combines one's environmental data and information with personal communication technology; the understanding is one's environment continually changing. This concept can secure his safe movement and/or control his level of comfort. The wireless agent is also proposed as one element of environment communication. This technology combines the conventional mobile agent function with information specific to the mobile terminal environment. Also, the combination of the wireless agent and ITS is discussed from the viewpoints of effective data communication. Furthermore, the concept of personal navigation based on personal handy-phone system (PHS) technology is introduced. Last, a couple of technologies to improve wireless transmission performance are discussed.