Due to the Alps, there are many mountain passes that connect valleys. The most important pass roads for transit trade are the Reschen Pass and Brenner Pass. Popular pass roads include the Stelvio Pass, Arlberg Pass, Karer Pass, Mendel Pass and the Gardena Pass. The Provinces of Trento and Bolzano have been responsible for the preservation and management of the state roads in their provinces since 1998.