[Tagging] tagging the diameter of a mini-roundabout

[Peter Elderson]

Op za 28 jan. 2023 om 23:38 schreef Colin Smale <colin.smale at xs4all.nl>:

> A form of roundabout common in the Netherlands has an inner ring which is
> often distinctly coloured and slightly raised, thus making it clear that
> traffic is intended to avoid it and use the outer ring, while keeping it
> perfectly usable by most vehicles.
> Example:
> https://nl.wikipedia.org/wiki/Rotonde_(verkeer)#/media/Bestand:N746-Noordergraafsingel-Harbrinkhoek.jpg
>
>

The raised part is the truck apron. Traffic, including trucks, is not
dsupposed to use the truck apron. The kerb and the raised part warn the
trucker who forgets that.
The roundabout shown there is a true roundabout. Mini-roundabouts do not
exist in Nederland, but we do have fake roundabouts (dot or circle in the
middle, possibly raised, no kerb, no roundabout rules.
Come to mention it, true roundabouts by themselves do not have special
priority rules in Nederland, just the oneway rule indicated by the
roundabout traffic signs. However, .priority is almost always indicated by
at least shark's teeth. If it isn't, traffic from the right has priority,
same as on regular junctions. (We're driving on the right).

As for diameters, I think the (minimal) turning circle or maximal rigid
vehicle length is what traffic needs. I am not sure that it can be
calculated from the diameters of inner centre circle, outer centre circle
and circumference of the entire traffic area.

On 28/01/2023 22:12 CET Philip Barnes <phil at trigpoint.me.uk> wrote:
>
>
> Diameter implies there is something circular. The paint is often round,
> not always, but most are just former T junctions or cross-roads where there
> is nothing to measure the diameter of .
>
> Phil (trigpoint)
>
> On 25 January 2023 17:50:54 GMT, Volker Schmidt <voschix at gmail.com>
> wrote:
>
> Is there an established way to tag the diameter of a mini-roundabout?
>
> We have the tag diameter, but I could not find it applied to
> mini-roundabouts.
>
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