Public transportation companies aim to incorporate quality and modern technologies on their services hoping to achieve the optimization of the employed material resources. Although the available resources are controlled, there is a lack of reliability in the process involved, mainly due human interactions which are subject to failures. This work presents an RFID system for fuel supply control of vehicles fleets. The system is based on a modular and adaptative RFID middleware (CloudRFID) which surveys as a foundation to the development of RFID applications. The outcome of this work demonstrates the advantages of the integration of RFID systems with process and business functionalities involving resources control and automation.