On 07/27/2010 08:00 AM, Nathan Edgars II wrote: > We have those tags: lanes=*, width=*, etc. But there's no "on the > ground" definition of importance, and there's nothing wrong with > tagging correctly for the renderers. Classification has been > subjective from the beginning in the US, because there is no > consistent government-assigned classification.
I’ve found that, when available, the HFCS (Highway Functional Classification System—not to be confused with High Fructose Corn Syrup) is quite consistent. Unfortunately, it’s not available for every area. I am of the opinion that it should be followed when possible. The system described at the wiki page under discussion seems like a good way to do it where HFCS is not available (with the addition of /trunk/ as described below, though trunks are not always limited-access.) > (By the way, the four lane limited access highway would still be > highway=motorway (or highway=trunk if it has at-grade intersections).)
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