Tide ASA is a public transport company in Hordaland, Norway which resulted from the merger of Gaia Trafikk and Hardanger Sunnhordlandske Dampskipsselskap (HSD). The company provides the public transit network in the city of Bergen, and most of the bus service in Hordaland on contract with Skyss. Tide also runs the buses in northern Rogaland on contract with Kolumbus. Formerly, Tide operated the passenger- and car ferry routes previously operated by HSD and Stavangerske, with the daughter company Tide Sjø.