The story
1849: Creation of the postal network diligence.
1906: First service of PostBus between Bern and Detligen.
1919: Inauguration of the line crossing the Simplon Pass.
1921: Grimsel Pass, Furka Pass, San Bernardino Pass, and Oberalp Pass are open to traffic.
1923: A three-tone horn is installed on the buses travelling on mountain routes.
1949: The bus lines of the Principality of Liechtenstein are operated by PostBus.
1959: All buses are of the same yellow color.
1961: Last service of horse diligence on the line Avers-Juf.
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2003: For the first time, PostBus carries more than 100 million passengers.
2005: PostBus Switzerland established as a subsidiary company of Swiss Post
2006: PostBus celebrates its centenary.
2011: PostBus launches free WiFi in Postbuses and becomes the first Swiss public transport operator to add fuel cell buses to its fleet.
From Wikipedia’s article on PostBus Switzerland, shared under CC BY-SA 4.0.4
