Mobile Terminal

A method of updating vehicle identification information, comprising:

• periodically transmitting, by a mobile terminal in a vehicle, said identification information which is included in first vehicle information,
• the first vehicle information comprising
• first identification information for identifying the vehicle;
• and
• first status information indicating a status of the vehicle,
• determining, by the mobile terminal, whether or not there is a possibility of collision or rear-end collision with another vehicle from second vehicle information received from said another vehicle and the first status information;
• determining, by the mobile terminal, whether or not there is a possibility that the vehicle is tracked by said another vehicle;
• determining, by the mobile terminal, whether an adverse influence on a safe driving support service being provided is large or small, depending on whether or not there is a possibility of collision or rear-end collision of the vehicle with the another vehicle;
• and
• performing, by the mobile terminal, the update of the first identification information in a case where there is a possibility of being tracked and in which the mobile terminal determines that the adverse influence on the service is small.