TERMINAL DEVICE

摘要

A map data storage unit (134) holds map data to which a road ID is assigned as the identification information for each predetermined section of at least a portion of road. A traffic congestion determination unit (120) determines whether or not a section corresponding to each road ID is congested. A transmission unit (124) sends a broadcast, from a vehicle traveling on each section of road, of vehicle data including the road ID and the traveling speed of the vehicle. At this time, the transmission unit (124) constructs a frame in which is combined the vehicle data received from other vehicles and the vehicle data of the vehicle itself. An information compression unit (122) compresses the amount of data by removing from the frame traveling speed data for sections determined by the traffic congestion determination unit (120) not to be congested.