The Slovak group of companies PPA CONTROLL has hundreds of successfully completed and launched projects to its credit. With its subsidiaries, it has been a quality brand and a reliable partner of the industry at home and worldwide for over 70 years. In the field of road management, it provides design and programming work, supplies and installs technological equipment for tunnels and motorways. It has implemented the Branisko, Horelica, Bôrik, Považský Chlmec, Bikoš tunnel projects and is currently involved in the Višňové tunnel. For many sections of motorways, the PPA CONTROLL Group has supplied the motorway information system, is involved in the supply of LED variable message signs and the equipment of integrated operator workplaces from where tunnels and adjacent motorway sections are monitored and controlled.