Abstract: A system that coordinates pickups of entities to be picked up includes a number of monitor devices, a number of authorized pickup entity devices, at least one communications network, at least one time to arrival estimation server, at least one coordination server, and at least one administration server. Each of the time to arrival estimation server, coordination server, and administration server may have respective databases stored on respective nontransitory computer- or processor-readable media. The coordination server permits interaction between the monitor devices and authorized pickup entity devices while maintaining privacy of entities logically associated with such devices and while addressing a plurality of technical problems that one of ordinary skill in the art may face when implementing the system that coordinates pickups.