UHB (Urskog - Hølandsbanen), also known as 'Tertitten', was a narrow gauge railway (750mm) between Sørumsand and Skulerud in Norway. The line was 57 km. long and was built in three stages: Urskogbanen opened in 1896; Hølandsbanen opened in 1898 and finally the line between Bingsfos and Sørumsand in 1903. Today part of the line is preserved as a museum at Sørumsand in Sørum kommune.
