Crete is easy to travel around due to its comprehensive bus system. There are frequent buses travelling along the length of the north coast. Less frequent services link north coast towns and resorts with places of interest on the south coast, via the interior mountain villages. Ferries link towns along the south coast and islands; some towns can only be accessed by sea. Many ferries operate only during the summer months, though. Those planning to bring their own car to Crete (or rent a car) should be aware that Greece has one of the highest road fatality rates in Europe. Roads in Crete have improved in recent years, but there are still many unpaved and rough roads in the south and country road signs are often only in Greek.