Terminal device

A terminal device that is mountable in a vehicle, comprising:

• a receiver, coupled to a vehicle, configured to receive i) traveling direction information indicating traveling directions of the vehicle in accordance with movement of the vehicle and ii) turn signal information associated with a direction indicator of the vehicle to be activated by a driver at a time to show intent to turn a direction or change lanes;
• storage;
• and
• a processor programmed to execute a collision prevention process relative to an oncoming vehicle when the vehicle turns a direction, the collision prevention process including controlling communication with the another vehicle to receive information of the oncoming vehicle, and notifying a driver of a presence of the oncoming vehicle depending on positional relationship between the vehicle and the oncoming vehicle, wherein
• the collision prevention process further includes, in order to determine a direction of a road on which the vehicle travels:
• storing in the storage the traveling direction information indicating a first traveling direction of the traveling directions, the first traveling direction being acquired when the receiver receives the turn signal information from the vehicle;
• updating the traveling direction information indicating the first traveling direction with the traveling direction information indicating a second traveling direction, the second traveling direction being acquired after the receiver receives the turn signal information, in a case where the second traveling direction indicates a direction opposite to a direction indicated by the turn signal direction information;
• and
• maintaining in the storage the traveling direction information indicating the first traveling direction in a case where the second traveling direction indicates a direction same as the turn signal direction information.