[Tagging] Marking dual carriageways

[Richard Mann]

I did manage to do it (reasonably accurately) by algorithm for the UK, but
it was a bit of a pain.

Adding dual_carriageway=yes tags, particularly in urban areas, wouldn't
hurt.

Richard


On Thu, Jul 10, 2014 at 11:20 AM, Mateusz Konieczny <matkoniecz at gmail.com>
wrote:

> I am thinking about marking tagging roads with separate carriageways. I
> want to create map with oneway roads, but in OSM data roads with separate
> carriageways that are not oneway are frequently represented as separate
> ways, both tagged as oneway.
>
> Adding tag that that would describe way as part of dual carriageway, with
> twin road leading in opposite direction would allow to solve this problem.
>
> I am currently thinking about good name for this tag and whatever there is
> possibly to achieve this result solely by processing OSM data (processing
> is probably necessary anyway to catch cases like
> https://www.openstreetmap.org/way/182138211 ).
>
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