Siemens supplied Vienna with the road traffic management system to control the flow of cars in the city center, thus significantly improving and optimizing the flow of traffic in Greater Vienna. In addition to providing monitoring and control for more than 1,200 traffic signals, the traffic control computer system serves as the basis for implementing traffic control, management, guidance and information strategies for Vienna's road traffic. The traffic situation on the roads is displayed by means of a multimedia wall that is 4 meters wide and 2.40 meters high.