Information processor and vehicle system

An information processor, comprising:

• a first processor configured to acquire, when a first vehicle is traveling on a first road toward an intersection and a second vehicle is traveling on a second road, which intersects the first road, toward the intersection, a traveling tendency of the first vehicle from a first storage unit storing the traveling tendency at an intersection of each of a plurality of vehicles, wherein the first storage unit is configured to store the traveling tendency at an intersection of each of a plurality of vehicles in advance of the first processor acquiring the traveling tendency of the first vehicle;
• a second processor configured to acquire, when the first vehicle is traveling on the first road toward the intersection and the second vehicle is traveling on the second road toward the intersection, riskiness of the intersection from a second storage unit storing the riskiness of each of a plurality of intersections, wherein the second storage unit is configured to store the riskiness of each of a plurality of intersections in advance of the second processor acquiring the riskiness of the intersection;
• a fourth processor configured to judge whether or not there is caution information at a time of passing through the intersection, based on the traveling tendency of the first vehicle acquired by the first processor and the riskiness of the intersection acquired by the second processor;
• and
• a transmitter configured to transmit a signal, when the fourth processor has judged that there is caution information at the time of passing through the intersection, to the second vehicle, wherein the signal includes the caution information, and the transmitter is configured to transmit the signal before the second vehicle enters the intersection.