 Telemark Bilruter have together with Setesdal Bilruter formed a joint subsidiary, Agder Buss, which operates regional traffic in eastern parts of Aust-Agder on a PSO contract from January 2015.Telemark Bilruter is the consequence of the constant merger of bus companies in Telemark, and was created in 1998 when Vest-Telemark Bilruter and Grenland Nord trafikkselskap merged.The first operation of a bus by a precessor was in 1910 when Fyresdal Automobilselskap bought a French La Buire.