at least one memory configured to store instructions; and

at least one processor configured to execute the instructions to perform operations, the operation comprising:

acquiring boarding stop information and getting-off stop information, the boarding stop information indicating a boarding stop where a passenger boards a vehicle and the getting-off stop information indicating a getting-off stop where the passenger gets off the vehicle;

determining route information based on the boarding stop information, the getting-off stop information and information on a plurality of stops included in a route for each of a plurality of the routes stored in a route information storage, the route information indicating a route of a vehicle that the passenger should board; and

determining a timing of transmitting information for a passenger based on the boarding stop information and a current position of a boarding target vehicle traveling on the route indicated by the route information, the information for a passenger including information on the boarding target vehicle; and

transmitting, at the determined timing, the information for a passenger to a terminal carried by the passenger.