[Tagging] More human readable values for traffic signs

André Pirard a.pirard.papou at gmail.com
Thu Oct 29 23:43:58 UTC 2015


On 2015-10-29 21:00, John Eldredge wrote :
>
> I think he is referring to the "do not enter" sign, a red circle with
> a horizontal white bar.
>
Jo sometimes speaks vaguely and publishes search/guessing exercises ;-) 
. What he means is:
> Also keep in mind there are 2 'oneway' signs. A blue one that can be
> round or rectangular
> <http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#F19> [an
> information sign] and a round red one
> <http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#C1> [a
> prohibitory sign].
The rectangular F19
<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#F19> is
disputably classified as "information" because it in fact also prohibits
driving in the other way and hence to U-turn.
The no-U-turn sign C33
<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#C33> might be
thought of as one-way, but it is not (it doesn't forbid other cars going
contra-way).
There is no round one-way sign that I know of.  But, of course, a follow
the direction
<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#D1>ahead
<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#D1>D1
<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#D1> placed
withing a street (not at a crossing) amounts to a no-U-turn with the
same remarks as for F19.

Once again, such a specialists' controverted discussion makes  one thing
certain:  those fuzzy road signals must certainly never be used for
routing (restrictions).  oneway=yes is much more obvious and foolproof. 
And it allows software to represent corresponding signals without any
need to tag them if someone likes to turn that option on (with the risk
of having two instead of one).  Remember the noexit=yes story !!!

Cheers

André.





> -- 
> John F. Eldredge -- john at jfeldredge.com
> "Darkness cannot drive out darkness; only light can do that. Hate
> cannot drive out hate; only love can do that." -- Martin Luther King, Jr.
>
> On October 27, 2015 9:13:40 PM Colin Smale <colin.smale at xs4all.nl> wrote:
>
>> Only the rectangular blue sign means one way traffic... The round
>> blue one tells you which way to drive at a junction which is subtly
>> different. What is the round red one you have in mind?
>> --colin
>>
>> On 28 October 2015 00:30:58 CET, Jo <winfixit at gmail.com> wrote:
>>
>>     Also keep in mind there are 2 'oneway' signs. A blue one that can
>>     be round or rectangular and a round red one.
>>
>>     2015-10-27 23:05 GMT+01:00 Michael Reichert <nakaner at gmx.net
>>     <mailto:nakaner at gmx.net>>:
>>
>>         Hi Mateusz,
>>
>>         Am Mon, 26 Oct 2015 08:58:08 +0100 schrieb Mateusz Konieczny:
>>         > I recently started tagging traffic signs and I am surprised
>>         by wide
>>         > usage country-specific traffic sign codes.
>>         >
>>         > I think that at least common signs may be tagged by
>>         human-readable
>>         > values. Some (see
>>         > http://wiki.openstreetmap.org/wiki/Key:traffic_sign#Human-
>>         readable_values
>>         > ) are already used
>>         >
>>         > I propose to add more like
>>         > - traffic_sign=oneway
>>         > - traffic_sign=no_stopping
>>         > - traffic_sign=no_parking
>>
>>         At least the oneway sign looks different from country to
>>         country. Or do
>>         you expect that a French oneway sign looks like the German
>>         one? (The
>>         German one contains the word "Einbahnstraße", the German
>>         translation of
>>         oneway)
>>         https://commons.wikimedia.org/wiki/File:Zeichen_220-20.svg
>>
>>         And even traffic signs without text often look different because
>>         different countries use different fonts.
>>
>>         That's why I suggest to use the country prefixes followed by
>>         a number or
>>         the name depending if the country numbers its traffic signs (like
>>         Germany) or not (like Austria).
>>
>>         Best regards
>>
>>         Michael
>>
>>
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