I do have a typical traversable roundabout close by. hgv=no is not correct, there are commercial activities around that need hgv access. The roads are adequate for that
The angle between incoming roads is not a suitabla measure, as the traversable roundabout has a circular "belly", providing additional space for turning longer vehicles. The diameter of this circular turning space in this specific location is 12m. The maximum length for articulated trucks is generally 16m in Italy. The probable reason why I see relatively frequent problems there, is that the junction is represented on big-G maps as a normal roundabout (they do not have a specific way to represent traversable roundabouts) and the size of this roundabout is a bit large on their map. This junction is on a route to reach a company that repairs agricultaral machinery, that arrives on long flat-bed articulated trucks. Coming back to my original question: could we agree that: 1) highway=mini_roundabout outside the UK is used to describe traversable roundabouts, provided the traffic rules are the same as on untraversable roundabouts 2) diameter= x m can be used to describe the available turning area diameter, if it is roughly circular. 3) we will look into defining an alternative way to describe the traversable roundabout area in a way similar to bridge or road geometry (and let us discuss that approach in a new thread) Volker On Thu, 2 Feb 2023, 09:58 Mark Reidel, <tagg...@mark.reidel.info> wrote: > On Thu, 2023-02-02 at 04:31 +0100, Matija Nalis wrote: > > If the actual issue is that HGV cannot pass some road, why not simply > > mark it as `hgv=no`? Besides being simple, it has the additional > > advantage that routers will actually already use it and direct HGVs > > somewhere where they can actually pass. > > Adding an access-tag like maxlength isn't the correct way to tackle > this, because: > a) there is no *legal* restriction that disallows a vehicle of a > certain length > b) it's not only about the length, but mostly about the turning radius > of trucks, which is not necessarily related to their length, especially > when they have more than 1 trailer. > > But overall, I don't see how this is of special importance for a mini > roundabout with a traversable surface, it being very much identical to > a regular crossing when you are allowed to go over the inner circle. > Shouldn't the angle between the two roads the vehicle wants to pass be > the limiting factor in that case? > > -- > Mark aka Nadjita > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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