[Talk-us] cycle.travel US bike routing, and unreviewed rural TIGER

Richard Fairhurst richard at systemed.net
Fri Jun 19 22:24:20 UTC 2015

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 takes (many) hours and requires
(many) GB of RAM both to route and to host.

cycle.travel penalises surface types variably: surface=mud gets a big
penalty, surface=gravel not so much.


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