2015-08-19 9:11 GMT+02:00 Lauri Kytömaa <lkyto...@gmail.com>: > 1) I'd say that since "trunk" is the next best thing below > motorway, in any country (or "region") there has to be something > between motorway standards and "unsurfaced tract unusable > after major rains" - primary is a valid long distance road, too. I'm > not even saying a trunk road could't be unpaved, or that it couldn't > be repeatedly blocked "sometimes". I did ask on the wiki > highway=trunk tag discussion page in 2009 whether anyone knows > any roads marked as trunk in osm which are unpaved, and only > later read somewhere that south of Sahara most trunk roads are > unpaved, but in that discussion there was no mention of whether > they are (generally) "usable" after major rains. >
OK, I will change it to primary to make it more consistent with reral usage and add "and highway=trunk quality in one region may be worse than highway=tertiary in another". > > 2) This gets a little philosophical, because it's about what makes a > road a road. It's somewhat misleading to write that the highway tag > doesn't say _anything_ about the quality, when it's easily read as > "doesn't say anything about the physical properties" - a road is, > IMO, by definition something that looks like a road and works like > a road (and in western world necessarily also: built as a road), not > any strip of land where somebody once drove through, so it does > describe the limits of what the physical properties can be expected > to be, i.e. the list of worst possible attributes that it needs to fulfill > for people call it a road. At the moment, I don't have a ready > sentence to add, but it's worth noting that the concept of "a road" > includes both usage and physical appearance. > Yes, for example Curiosity tracks on Mars would not qualify as highway=trunk :) I think that it is already handled by defining trunk to service as road.
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