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Handedness of rail traffic: left hand and right hand operation world wide.
(upload.wikimedia.org)
Not visible in the map, but interesting to note, is that in France the trains normally drive on the left, except in Alsace where they drive on the right as a legacy of the time the province belonged to Germany.
The terminology of this map confuses me quite a bit. Austria has mostly right-hand traffic nowadays, the Franz-Josefs-Bahn being the only exception I am aware of; it used to be a lot more mixed until the early-to-mid-2010s.