This collision possibility determination device is a device for determining the possibility of collision between a host vehicle and another vehicle, and is provided with: a generation unit which generates first predicted travel behavior data indicating predicted future travel behavior of the host vehicle; a communication unit which receives, via vehicle-to-vehicle communication, second predicted travel behavior data indicating predicted future travel behavior of the other vehicle; and a determination unit which determines the possibility of collision between the host vehicle and the other vehicle on the basis of the generated first predicted travel behavior data and the received second predicted travel behavior data.
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