Garbage collection time notification method

A garbage collection time notification method that is performed by:

• a garbage truck including a receiver that acquires information on a current position of the receiver itself;
• an information processing device capable of communicating with the garbage truck, the information processing device storing position information on a plurality of collection sites at which the garbage truck collects garbage, and a travel route along which the garbage truck visits the plurality of collection sites one after another;
• and
• a vehicle capable of communicating with the information processing device, the vehicle including a camera that images surroundings and a receiver that acquires information on a current position of the receiver itself, wherein:
• the vehicle transmits images in which the collection sites appear among images captured by the camera to the information processing device along with imaging information showing an imaging position and an imaging date and time of each of the images;
• and
• the information processing device performs:
• acquiring the images and the imaging information transmitted by the vehicle;
• acquiring information on a current position of the garbage truck;
• based on the information on the current position of the garbage truck and the imaging information, identifying, among the plurality of images acquired from the vehicle, a yet-to-be-visited collection site image in which a yet-to-be-visited collection site appears that is the collection site by which the garbage truck has not yet passed in the travel route;
• based on the identified yet-to-be-visited collection site image, calculating an estimated garbage amount that is an estimated value of an amount of garbage brought together at the yet-to-be-visited collection site;
• calculating an expected time of arrival at a predetermined collection site that is the collection site by which the garbage truck passes after the yet-to-be-visited collection site in the travel route such that the expected time of arrival at the predetermined collection site becomes later when the estimated garbage amount is large than when the estimated garbage amount is small;
• and
• outputting notification information for notifying the expected time of arrival at the predetermined collection site.