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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.
That seems to be the insinuation.
Based on what I know, lengths of track with a single line of rail typically have periodic sections with sidetracks to allow trains to “pull over” and let an oncoming (usually the faster) train pass them before returning to the main track.
Hmmm I mean I guess we’re a very big country for our population so maybe the mining and interstate rail overwhelm the metro and Sydney-Melbourne networks… I’m just surprised it’s by more than 80%
If you go by length instead of ridership it seems extremely plausible. Australia is a big place and building 2 lanes for mostly freight trains is an unnecessary expense.
Sidings/loops/passing tracks, allow trains to pass on a single track, and since things can be more regular scheduled (ideally anyway) with trains, they can work well enough and with much less track building needed.