A fifth method might be to use forward and backward tags on the node where the 
sign is tagged much like one of the suggested methods for tagging traffic 
signals. 
https://wiki.openstreetmap.org/wiki/Traffic_signal#Tag_all_incoming_ways

Seems like one uniform way of tagging traffic control signs and signals should 
be possible and desirable.

Tod

-- 
Sent from my mobile device. Please excuse my brevity.

"Balázs Barcsik" <[email protected]> wrote:
>Hi There!
>
>I would like to introduce give_way and stop alerts into navigation
>tools
>such as OSMAnd.
>For this approach a good tagging is needed. So when someone driving and
>arrives to an intersection then the app would show give way or stop
>depending on which road he/she is. (or nothing if the road is a
>priority
>one)
>
>Can you help me define this in a proper way?
>
>I think there are several options:
>
>1. extend highway=give_way (and stop) to able to use on ways
>    https://wiki.openstreetmap.org/wiki/Tag:highway%3Dgive_way
>2. define a new tag: priority_road=give_way (stop)
>    link to existing tag
>https://wiki.openstreetmap.org/wiki/Key%3Apriority_road
>3. define new tag: priority=give_way (stop)
>  link to existing tag https://wiki.openstreetmap.org/wiki/Key:priority
>4. define new type - priority:
>    link to my proposal:
>https://wiki.openstreetmap.org/wiki/Proposal:_relation:priority
>
>Thanks, Balazs
>
>
>------------------------------------------------------------------------
>
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