 At the same time, the existing tramway, which had previously operated without line designators, received the line numbers 1 and 2.From 1916, the Biel–Täuffelen–Ins-Bahn connected in Nidau with the tramway network.In 1930, lines 1 and 2 were combined into a new line 1, from Nidau to Bözingen/Boujean.