[Tagging] emergency bays - which side?

Marc Gemis marc.gemis at gmail.com
Mon Jan 1 13:05:24 UTC 2018


Another one that is similar is passing place:
https://wiki.openstreetmap.org/wiki/Tag:highway%3Dpassing_place
Seems to be rather similar to emergency_bay in tagging methodology.

m.

On Mon, Jan 1, 2018 at 1:19 PM, Volker Schmidt <voschix at gmail.com> wrote:

> Emergency bays and bus bays are physically very similar, i.e. a short
> piece of an additional lane on a road.
>
> Unfortunately the two tags highway=emergency_bay and
> bus_bay=both|left|right use very different approaches to describing
> essential the same physical arrangement.
>
>
> bus_bay=both|left|right
>
> highway=emergency_bay
>
> wiki page
>
> https://wiki.openstreetmap.org/wiki/Key:bus_bay
>
> http://wiki.openstreetmap.org/wiki/Tag:highway%3Demergency_bay
>
> node
>
> no (according to the wiki page)
> yes (in reality there are few cases of bus_bay=yes with highway=bus_stop)
>
> yes
>
> node example
>
> http://www.openstreetmap.org/node/2134413721
>
> http://www.openstreetmap.org/node/1690562827
>
> http://www.openstreetmap.org/node/4892296128
>
> http://www.openstreetmap.org/node/3246948212
>
>
> way
>
> yes
>
> yes
>
> way example
>
> http://www.openstreetmap.org/way/253182588
>
> http://www.openstreetmap.org/way/460019134
>
> left|right|both
>
> yes (mandatory)
>
> not foreseen in the wiki page
>
>
> node: 55
>
> way: 1715
>
> node: 3710
>
> way: 642
>
> I personally like the bus_bay approach better, but I see the drawback of
> having to split the road way twice for every occurrence, when you use the
> type:way approach
>
> The emergency_bay approach is easier to map if you only consider the node
> approach and only on one-way streets, assuming that  you can define the
> default as being on the right-hand side for right-hand-drive countries (and
> symmetrically for the left-hand ones). For dual lane traffic or for
> emergency bays on the "wrong" side of the road you need an agreed way to
> define which side of the road. I do not like the way approach of the
> emergency_bay tagging, as it actually requires a separate way, which does
> not reflect the reality on the ground.
>
> As both tags are so far relatively low-use, it may not be too late to
> unify the bus_bay and emergency_bay mapping approaches.
>
> Volker
>
>
>
>>
>
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>
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