Trolleybuses, powered by electricity drawn from overhead wires, were used on the main line, Thun–Beatenbucht, connecting at Beatenbucht with the Thunersee–Beatenberg funicular and with a motorbus route covering the section to Interlaken. In 1982, the trolleybuses were replaced with conventional, diesel-powered buses. STI introduced its first night service in 1993, between Thun and Bern called the Moonliner.
Electric trolleys, powered by electricity from overhead wires, operated on the main line, Thun–Beatenbucht, connecting at Beatenbucht with the Thunersee–Beatenberg funicular and a motorbus route to Interlaken. In 1982, they were replaced with conventional diesel-powered buses. STI introduced its first nighttime service in 1993, between Thun and Bern called the Moonliner.