Abstract: A self-powered and self-contained transit media signage assembly configured to fit within a predefined space in a transit vehicle and method for managing is disclosed. Said assembly comprising a portable video display screen affixed to a wall of a transit vehicle connected to a removable power source located at a base portion of the transit media signage assembly and hidden from view by passengers, and at least one input device connected to the removable power source and to the video display screen, wherein the removable power source consists of a plurality of batteries, and wherein the portable video display screen is configured to receive a plurality of dynamic video assets stored in a server and transmitted to the video display screen via a plurality of workstations. The dynamic video assets consists of up-to-date advertising and informational advisories, combined with static print advertising that also functions to conceal the power source.