The extension of introducing electronic ticketing sytem is an international tendency. Its realization is essential for optimum and economic operation. The condition of introducing electronic ticketing system is the installment of GPS/GPRS-based automated vehicle following and traffic control system, as this system (board unit) could be made suitable for operating sensors found on the vehicles.

The most important expense elements of building up the system are the following:

• electronic card,
• personalization,
• card charging and ticket selling automats,
• sensor, validator on vehicles,
• sensor detector,
• controller machine,
• central company system.