 After further mergers, the railway line has been part of the Aare Seeland mobil (ASm) since 1999.The Langenthal-Jura Railway, which was based in Langenthal, opened its metre-gauge line, mostly located in the canton of Bern, from Langenthal via Niederbipp to Oensingen Schulhaus in the canton of Solothurn on 26 October 1907.It has been electrified at 1200 Volt DC since its opening.