The invention relates to a system for controlling the navigation of a motor vehicle equipped with a covering system that can be removed depending on the cargo being transported, comprising a system for controlling a vehicle and a remote site, said control system comprising: a first comparison means capable of periodically comparing the positioning signal received from a means for identifying the position of the removable covering, with a value associated with a position of said removable covering; a control means capable of transmitting a volume request to a means for determining the volume that is being transported, and a position request to a positioning device, upon receiving a signal from said first comparison means; transmitting and receiving means capable of transmitting the volume and the position that have been determined to a remote site and capable of receiving at least one request to load said remote site, including at least one load position, load description and load volume; means for displaying the loading request; and a remote site that is equipped with processing and storing means, capable of receiving the volume and position of the vehicle as determined, of receiving at least one loading request for the vehicle, and of determining whether said vehicle can accept the loading request depending on the vehicle specifications, the vehicle position and the loading request.