A distribution system, which includes the steps of: transporting a container on a chassis of a tractor trailer to and aligning it with a buffer ; raising the container with a support structure a predetermined height; entering a containment cavity of the buffer ; and lowering the container on a container stand of the buffer, to allow the chassis to exit while allowing the container to remain. In the present invention, this notification is provided by the fallover node acting as backup for the server node. A unique signature characterizes each marker so that its exact location relative to the camera may be calculated. An overlay error is obtained from the overlay target by analyzing the image information or the intensity signal of the overlay target.