Harald Kliems wrote:
Until then you could consider a user setting to avoid/not avoid
unpaved roads.
Unfortunately contraction hierarchies - the routing algorithm used by OSRM -
don't really allow user settings. For each distinct routing profile, you
need to regenerate the routing graph, which
Richard, I would somewhat caution against penalizing unpaved roads too
much. In many areas of the US they actually make wonderful cycling routes,
whereas the paved alternatives are high traffic and unpleasant to ride on.
Of course, proper smoothness tagging would help but that will be a long way
Just as a postscript to this discussion I thought I'd cite an example area.
If you look here, in Georgia:
http://cycle.travel/map?lat=31.9023lon=-84.0398zoom=14
you'll see that most of the roads are unreviewed TIGER residentials. Of
those, these are adjacent to each other:
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