On 2015-06-03 02:04, pmailkeey . wrote:
iD shows oneway=unknown if it's not set. If it's unknown, iD should not show oneway at all.
I agree.
In OSM if oneway=no then it's not oneway and the oneway tag should not appear at all.
Here I don't agree.
The only time oneway should appear is in the case of oneway=yes - and the '=yes' is superfluous.
Some roads are implied oneway. E.g. junction=roundabout and highway=motorway both imply that the road is one-way only. If for some reason the object in case is not oneway, a oneway=no tag is very much needed.
I agree that in every case where oneway=yes is not implied, oneway=no is superfluous (in a network design way), but that does not make oneway=no superfluous.
There is also the occurence of oneway=-1 in case someone reverses the direction of a way. What should be done when the only possibility for oneway is either set or unset and the direction gets reversed? Should reversing be disallowed? Should you get a warning "oneway street can not be reversed"?
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