 It consists of measuring, control and signaling devices, located in zones where driving conditions may vary—at interchanges, near viaducts, bridges, tunnels, and in zones where fog and strong wind are known to occur.The system comprises variable traffic signs used to communicate changing driving conditions, possible restrictions and other information to motorway users.It serves, either directly or via connecting roads, a large number of tourist destinations such as Bjelolasica in Gorski Kotar, a large number of Adriatic Sea resorts and several national parks and nature parks.