[Tagging] How to tag an imaginary oneway barrier

Jo winfixit at gmail.com
Sun Feb 2 06:50:08 UTC 2014

The 4th option is to use turn restrictions on the crossing where the
'virtual' sign is placed.


2014-02-02 André Pirard <A.Pirard.Papou at gmail.com>:

>  On 2014-02-01 10:05, Pee Wee wrote :
>  On the Dutch forum<http://forum.openstreetmap.org/viewtopic.php?pid=394396#p394396>there is some discussion on how to tag a common situation.
>  It is about a street that has no traffic sign on one end (side A) and a C6
> sign<http://commons.wikimedia.org/wiki/File:Nederlands_verkeersbord_C6.svg>on the other end (side B) .  Ofcoarse it is not allowed to enter this
> street by car from side B. If you enter the street by car from side A you
> are allowed to drive all the way. But you are even allowed to drive to
> (lets say) half way and then return. In other words... this is not a oneway
> street for motorcars. This makes the traffic sign a more or less imaginary
> oneway barrier.
> Let's for simplicity's sake asume the implication of the sign is
> "motorcar=no",  how should this be tagged?
> In Belgium, sign C3 and similar means "no entry in both directions"<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#C3>
> .
> [image: C3]
> Sign C1 means one-way<http://wiki.openstreetmap.org/wiki/Road_signs_in_Belgium#C1>
> .
> [image: C1]
> The difference is that the driver facing C1 is told that he can drive
> "round the block" to enter the street while that there is no hope to do so
> in case of C3.  This sounds very sound.
> I think it's a European rule and so, that, from a European perspective,
> it's a Road Administration error to place a C3 signal at only one end and
> hence that OSM shouldn't try to map signaling errors.
> From a pure logical point of view  "This signs tell you that you cannot
> enter this street, but that you may go round the block and that, if you're
> lucky enough, you may find no sign there. In that case, you may come back
> here through the other end and U-turn right behind this sign just as if it
> did not exist.  Good luck." sounds kinda funny.  But maybe only to me.
> On 2014-02-01 17:39, Colin Smale wrote :
> On 2014-02-01 17:30, Masi Master wrote:
> Normally traffic signs belongs to the road to the next  intersection/crossing.
>  That depends on the country - different jurisdictions have different
> conventions. In the UK the sign's effect is often "until further notice",
> i.e. until there is another sign telling you differently. It doesn't
> automatically get nullified at the first side road like it does in many
> countries.
> Strange to me again because the reason why the signs *have to* be
> repeated is that drivers entering the road at that "next crossing" wouldn't
> know them otherwise.  How do the UK drivers know?
>  Cheers,
>   André.
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