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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.
Are the legend markers not ordered? Or is ‘Left-hand traffic with exceptions’ really more ‘left-hand’ than ‘Left-hand traffic’?
I think it is less. And more than 20% share is more. As in, we do left handed, and we also have a significant portion of our network that is multi track and therefore abides by that convention. As opposed to somewhere that is just left handed, but doesn't have a mature/extensive use of that convention because their network is smaller/sparser