Patent ID: 8078391

Claim:
A mobile communication terminal apparatus configured to be mounted on a first vehicle, the mobile communication terminal comprising: an acquirer that acquires road traffic information from road traffic information communication apparatuses located at intervals, the road traffic information being obtained by the road traffic information communication apparatuses from a traffic information source other than the mobile communication terminal apparatus; a storage that stores first time-specific road traffic information comprising the acquired road traffic information to which a time that the road traffic information was acquired is added; a direction measurer that measures a traveling direction of the first vehicle on which the mobile communication terminal is mounted and generates traveling direction information; a first receiver that receives traveling direction information indicating a traveling direction of a second vehicle distinct from the first vehicle on which the mobile communication terminal is mounted; an information selector that selects part of the stored first time-specific road traffic information, as second time-specific road traffic information, based on both the traveling direction of the first vehicle and the traveling direction of the second vehicle, to acquire road traffic information relevant to the second vehicle; and a transmitter that transmits the selected second time-specific road traffic information from the first vehicle on which the mobile communication terminal is mounted to the second vehicle.