The aim of this thesis is to determine, whether it is possible with specific type of electronic cards (passive RFID tags) to pay a toll. This means whether the electronic system is sufficiently reliable, useful and suitable for payment of toll roads. A toll is a fee for use of toll roads. There are several payment methods for toll roads, such as payment with cash at toll stations or a prepaid system with a vignette, where the vignette affixed on the windscreen serves as proof. Electronic toll collection is in rise. Toll is paid through special stickers or devices mounted on the windscreen, which communicate with the electronic devices placed by the road. The thesis describes the basics of the RFID system and describes current use of the system of passive RFID tags for toll collection in the world. The final chapter contains a description of system testing, which was performed through Traffic Technical Institute (PTI), which operates within Faculty of Civil and Geodetic Engineering in Ljubljana. I also participated in system testing.