Background: in Thailand, there are many old graded tracks that have been downgraded to
highway=path due to obstacles, vegetation, and the perception they may not be passable by motorcars.
When these tracks are downgraded to
highway=path without additional tags (
width), we lose the information that this is a wide “path” which:
- may still be passable for specialized off-road vehicles like super heavy-duty 4WDs, ATVs…
- is a lot easier to navigate for 2-wheel vehicles (MTB, dirt bike) than a narrow nature trail.
smoothness are understood by routers and commonly used by renderers, width isn’t.
According to Tag:highway=track - OpenStreetMap Wiki
Some examples where highway=track is generally not appropriate:
- trail or path that is not wide enough for a typical four-wheeled motor vehicle 
 A “typical four-wheeled motor vehicle” means a general purpose or average motor vehicle commonly used in a given region. The size and capability of what is considered a typical, common, or average vehicle varies around the world.
For Thailand, this would mean that if a track is not passable by the standard high-clearance pickup truck (often not 4wd), it should be tagged instead as a path.
However, according to Key:smoothness - OpenStreetMap Wiki
In this case, it would mean that an old track only passable by ATVs or dirt bikes could be kept with
highway=track + smoothness=very_horrible, and another track only passable by heavy-duty 4WD can be tagged as
highway=track + smoothness=horrible
So which is which?
11 posts - 7 participants
Ce sujet de discussion accompagne la publication sur https://community.openstreetmap.org/t/conflicting-global-wiki-definitions-for-deciding-between-tracks-and-paths-based-on-passability/4540