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Project-OSRM / osrm-backend

Open Source Routing Machine - C++ backend
http://map.project-osrm.org
BSD 2-Clause "Simplified" License
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Speed for surface=fine_gravel too low for bicycles #3681

Closed ftrebien closed 3 months ago

ftrebien commented 7 years ago

Currently the speed for surface=fine_gravel is 6, the same as for other surfaces in which the cyclist is assumed to be walking. OSM's wiki, however, says that fine gravel means "surface of firm, granular grit ... easy to walk, jog, cycle or ride on ... bicycles tires will not leave any imprints at least in dry weather".

This sounds similar to surface=compacted, "the surface is more stable than loose gravel ... mixture and compacting leads to more grip and stability". From that description, I think fine gravel should be considered at least as fast as surface=compacted.

For comparison, GraphHopper considers fine gravel as fast as the default speed in asphalt.

emiltin commented 7 years ago

i also think that some of the current speed reduction should be replaced by change in rates. ie. the speed might be almost the same, but it's less attractive

github-actions[bot] commented 4 months ago

This issue seems to be stale. It will be closed in 30 days if no further activity occurs.