SIREN CONTROL METHOD, INFORMATION PROCESSING APPARATUS, AND NON-TRANSITORY COMPUTER READABLE MEDIUM

A controller is configured to acquire primary information indicating that an emergency vehicle during emergency driving has satisfied the condition that the emergency vehicle has entered a particular area in which right of way may be given and/or the condition that the emergency vehicle has shifted into a specific driving mode in which right of way may be given within the particular area. Upon acquisition of the primary information, the controller stops a siren of the emergency vehicle or reduces the volume of the siren of the emergency vehicle.