[OSM-talk] Editing road geometry Australia

[Warin]

A left turn there would be legal, unless there is a local sign.
So I would not place a turn restriction on it base on satellite imagery.



On 12/01/19 07:47, Jem wrote:
> Spot on. Although the routing engine data could impose a turn 
> restriction here based upon geometry as part of their data pipeline.
>
> I wonder if it is legal to turn there and, if not, does that form part 
> of the ground truth IRT OSM, regardless of whether there is a sign 
> present.
>
>
> On Fri, 11 Jan 2019 at 22:53, Marc Gemis <marc.gemis at gmail.com 
> <mailto:marc.gemis at gmail.com>> wrote:
>
>     If you miss the on-ramp and are waiting for the traffic signals, a
>     router can recalculate the route in the meantime and still try to let
>     you turn left at the traffic signals.
>
>     m.
>
>     On Fri, Jan 11, 2019 at 1:47 PM Maarten Deen <mdeen at xs4all.nl
>     <mailto:mdeen at xs4all.nl>> wrote:
>     >
>     > I agree that Markus' solution is more elegant (and I was more
>     looking to
>     > the offramp itself). I would normally also map it like that but
>     I also
>     > don't go out of my way to correct situations like that.
>     > The way it is mapped now is more organic, more as you would actually
>     > drive. As such I don't see it as wrong.
>     >
>     > I would not add a turn restriction. For routers it is useless
>     because
>     > you never get that route anyway.
>     >
>     > Regards,
>     > Maarten
>     >
>     > On 2019-01-11 13:23, Jem wrote:
>     > >> I'd map that place like that:
>     > >
>     https://wiki.openstreetmap.org/wiki/File:ID_Screen_Shot_from_-32.0914374,_116.0129206.png
>     > >
>     > > I agree. And a supplementary question... would you also add a
>     > > no-left-turn restriction from https://osm.org/way/581948344 at
>     > > https://osm.org/node/5680879176? I would, and have done in the
>     past.
>     > > But to be honest, I'm not sure if a turn like that (having already
>     > > passed the slip lane designated for the turn) is legal or not.
>     > >
>     > > On Fri, 11 Jan 2019 at 20:47, Markus
>     <selfishseahorse at gmail.com <mailto:selfishseahorse at gmail.com>>
>     > > wrote:
>     > >
>     > >> On Fri, 11 Jan 2019 at 07:40, Maarten Deen <mdeen at xs4all.nl
>     <mailto:mdeen at xs4all.nl>> wrote:
>     > >>>
>     > >>> On 2019-01-11 07:16, Petra Rajka - (p) wrote:
>     > >>>
>     > >>>>
>     > >>>> See below two cases where we would simplify the geometry:
>     > >>>>
>     > >>>>       * -32.0914374, 116.0129206
>     > >>>
>     > >>> Is seen no big problem in how the roads are layed out there.
>     > >> Coming from
>     > >>> the motorway there is a clear divider where the offramp connects
>     > >> to the
>     > >>> Albany Highway.
>     > >>
>     > >> <https://www.openstreetmap.org/way/596272469> and
>     > >> <https://www.openstreetmap.org/way/596272466> form a
>     > >> double-rectangle,
>     > >> but there isn't such a divider. I'd map that place like that:
>     > >>
>     > >>
>     > >
>     https://wiki.openstreetmap.org/wiki/File:ID_Screen_Shot_from_-32.0914374,_116.0129206.png
>     > >>
>     > >>> I have more problems with the tags of the on- and offramp. They
>     > >> are
>     > >>> mapped as motorway when they should be mapped as motorway_link.
>     > >> The two
>     > >>> bridges in the on- and offramp are mapped as motorway_link.
>     > >>
>     > >> +1. I'd also delete the descriptions like Tonkin Highway
>     Southbound
>     > >> Ramp off to Albany Highway in the name tag unless the ramps are
>     > >> signed
>     > >> like that on site.
>     > >>
>     > >>>>       * -35.3409195, 149.1616891
>     > >>>
>     > >>> Ways 77001149 and 77000891 should IMHO not be mapped like
>     that but
>     > >>> mapped with turn:lanes.
>     > >>
>     > >> +1
>     > >>
>     > >> Regards
>     > >>
>     > >> Markus
>

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