 In 1943 11 companies merged to form Vest-Telemark Billag, and on 1 August 1972 it merged with Fyresdal-Vrådal-Nissedal Billag and Seljord Automobillag to create Vest-Telemark Bilruter.In January 1974 also a part of Reinums Bilruter was taken over.Grenland Nord had its roots back to 1920 and was created by a merger in 1989.