Provided herein is an autonomous or semi-autonomous vehicle fleet comprising a plurality of electric autonomous vehicles for apportioned display of a media, operating autonomously and a fleet management module for coordination of the autonomous vehicle fleet. Each autonomous or semi-autonomous vehicle comprising a screen configured to display the media. Activation, deactivation, brightness modification, in combination with specific media selection enables more efficient media display.

A system includes: a plurality of functional units each configured to perform a process for controlling unmanned driving of a moving object; a first time management unit configured to manage a first time that is used in a first functional unit, the first functional unit being part of the functional units; a second time management unit configured to manage a second time that is used in a second functional unit, the second functional unit being a different one of the functional units from the first functional unit; a difference degree detection unit configured to detect a degree of difference between the first time and the second time; and an execution unit configured to execute either or both of the following operations when the degree of difference is equal to or larger than a predetermined threshold: warning an administrator, and reducing a moving speed of the moving object.

A computer-implemented method of enabling optimisation of trajectory for a vehicle, the method comprising: determining a trajectory for the vehicle using: an algorithm; a vehicle model defining path constraints for the vehicle through space; a propulsion system model defining parameters of a propulsion system of the vehicle; an objective function defining one or more objectives; and controlling output of the determined trajectory.

A method may include a first UAV of a plurality of UAVs flying a first vector comprising a first heading and speed; a second UAV of the plurality of UAVs flying a second vector comprising a second heading and speed; at a first time, while the first UAV is flying the first vector and the second UAV is flying the second vector, determining a first distance between the first UAV and the second UAV; at a second time, the second time being after the first time, the second UAV transitioning to flying a third vector comprising a third heading and speed, the third vector being different from the second vector; after the second UAV has transitioned to flying the third vector, the first UAV observing the second UAV; and the first UAV providing a first observation of the second UAV flying the third vector to the second UAV.