 The Mala Kapela and Sveti Rok tunnels are not only the largest individual structures on the motorway but they are also the longest tunnels in Croatia.The tunnels separate three distinct climate zones.The Mala Kapela Tunnel spans between the continental climate of the central Croatia and the mountain climate of Lika, while the Sveti Rok Tunnel provides a link between Lika and its mountain climate and the Mediterranean climate of Dalmatia.