An integrated transportation system (TIS) that comprises at least one Fleet Management System (FMS), Ride Sharing (RS) module and Administrator of the TIS that is configured to supervise and mediate communication between the FMS and RS module upon uploading transportation service offers through the RS module to potential passengers and cargo. The TIS comprises functionalities that enable establishing FMS on the TIS, enabling the FMS to offer transportation service offers to TIS users through the RS module, receiving requests for such services through the RS module and supervising their execution. The TIS also maintains a database relating to transportation services carried out through it and offers access to such database to interested parties.