 The route also allowed somewhat more connections from Oensingen and more services for the workforce of the companies in the Balsthal industrial district of Klus (including Von Roll) to be provided by the Langenthal-Jura Railway or from 1918 by the SNB; Klus itself has been served since 1899 by the standard gauge Oensingen—Balsthal railway ("Oensingen-Balsthal-Bahn", OeBB).As the SBB strongly expanded regional services on the Olten–Oensingen–Solothurn line in the following years, passenger numbers collapsed; the SNB service to Solothurn was no longer able to compete with the SBB over the entire line and concentrated on serving the traffic between Solothurn and Niederbipp.Due to a lack of passengers, the LJB closed the most unprofitable section, the about one and a half kilometre-long "Oensingen SBB"–"Oensingen Schulhaus" section on 14 May 1928 and subsequently dismantled it.