Container yards are massive areas where trucks, trailers and other large haul vehicles lug in containers, deposit them for transfer to other trucks or ships. Similarly they pick up containers offloaded from ships or other trucks. This is of course, not as simple to operate as it sounds. Some container yards easily measure 25 kilometers across having thousands of containers,either to be deposited or awaiting pick-up. Truck drivers are interested in picking up or depositing their containers in the shortest possible time.Even large amounts of staff, radio handsets, access to computer terminals and databases do not make this task easy.