INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM

An information processing system (10) including: a communication unit that communicates with a vehicle; and a controller (11, 12, 13) configured to control the communication performed by the communication unit. The controller (11, 12, 13) is configured to: obtain position information of a first vehicle (A) and sensor data of the first vehicle (A); obtain objects present around the first vehicle (A) and position information of the objects from the sensor data; calculate a collision risk between a second vehicle (B) and each of a plurality of objects present around the second vehicle (B); and determine a transmission order of object information on each of the plurality of objects based on the collision risk. The communication unit is configured to output the object information to the second vehicle (B) based on the transmission order.