While I agree with Georg's assessment in general, I want to point out that in Thailand I often do downgrade an unclassified highway when it enters a residential area because the differences between the two ways can be significant. You will be driving along on a nice, smooth, two-lane highway and when it enters a hamlet it might transform into a very narrow one-lane street lined with houses. My intent when tagging is to indicate that the highway when it passes through a town is not in any way a high-speed thorofare. I was under the impression that "downgrading" it to residential would help routers evaluate various alternative routes better.
So, yes, I do perceive an unclassified highway to be more significant than a residential highway in several ways, speed, convenience, and also safety. On Wed, Feb 20, 2019 at 5:05 PM Georg Feddern <o...@bavarianmallet.de> wrote: > Am 20.02.2019 um 10:22 schrieb Florian Lohoff: > > So for me retagging residential to unclassified is broken under the > assumption that unclassified is something "better" than residential. > > It is even more broken when there is residential usage in which case > unclassified is inappropriate. > > While discussing i found that there was some modification to the German > version of unclassified not saying that unclassified is something > "better" but suggesting that an unclassified should be dragged into > city limits until the next higher class street. This lets user > assume that unclassified is some higher priority than residential. > > > I was treating those streets identical for the last 10+ years and only > the city limits gave the indication whether to use unclassified or > residential. > > Am i wrong with that usage? > > > Even the english wiki says: > "The tag highway <https://wiki.openstreetmap.org/wiki/Key:highway>= > unclassified is used for minor public roads typically at the lowest level > of the interconnecting grid network." > > As part of the interconnecting grid network it should connect to at least > unclassified or higher roads - unless it is a dead end settlement. > Tagging a through connecting road only because it is inside a city limit > as residential makes no sense. > And usually a connecting road from outside a city limit has at least a bit > more traffic as an inner-city-only residential. > So the conclusion an unclassified has a bit higher priority than a > residential is not far from reality. > > Otherwise there is often the problem to tag the main access roads inside a > bigger residential area. > The practice to tag those as unclassified for a bit higher priority may > not be optimal - but suitable. > > This discussion - and usage - is some years old now - and I thought you > had at least knowledge of it from the german forum. > > Georg > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > -- Dave Swarthout Homer, Alaska Chiang Mai, Thailand Travel Blog at http://dswarthout.blogspot.com
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