[Tagging] Traffic sign relevant direction: relation type:enforcement vs. direction=* vs. traffic_signals:direction=*

Marc Gemis marc.gemis at gmail.com
Tue Mar 28 06:05:58 UTC 2017

What are good reasons to change the direction of a way ? Oneway comes
to mind, but is split way at stop sign, revert one arriving way,
change the oneway tag of tag a realistic scenario ? So you end up with
a oneway way that becomes a two-way road at the stop sign.
Are there other reasons to revert a the direction of part of a way ?

Until now I have not seen any real example from the opponents of the
direction tag on a node that shows the need for a relation because the
direction of the node is ambiguous.
All I have seen is "there is a theoretical possibility that..."

Please prove me wrong and show some real world example where it does not work.
(I do understand the need for a relation in case you have to stop
unless you turn to the right).


On Mon, Mar 27, 2017 at 5:29 PM, Martin Koppenhoefer
<dieterdreist at gmail.com> wrote:
> 2017-03-27 16:34 GMT+02:00 Marc Gemis <marc.gemis at gmail.com>:
>> In the case you have added e.g. a stop sign on the way. A second
>> mapper comes in, splits the way on the stop sign, reverts the
>> direction of one of the spit parts. Now the node is at the end of 2
>> ways with different direction and one cannot know what is
>> forward/backward in that node. But any good editor can give a
>> warning/error for such a case.
> yes, the editor can issue a warning, but what should be the reaction then?
> Shall we discourage changing way directions because of a stop sign node on
> this way? Usually there's a good reason for people changing way directions,
> adding more complexity to these changes with highway signs depending on them
> is not necessary.
> Cheers,
> Martin
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