[Tagging] Carriageway divider

[Fabrizio Carrai]

This could be a solution but it is against the reality: this kind of road
are indeed a single entity. The "legal" division, i.e. the "solid_line" is
just an attribute.
Indeed, the current mapping rules [1] indicate that separate ways have to
be traced when there is a physical division.

Ciao
Fab

[1]
http://help.openstreetmap.org/questions/4572/when-to-use-two-parallel-ways-for-roads
[2]
http://wiki.openstreetmap.org/wiki/Editing_Standards_and_Conventions#Divided_highways


2012/8/19 Markus Lindholm <markus.lindholm at gmail.com>

> On 19 August 2012 11:44, Fabrizio Carrai <fabrizio.carrai at gmail.com>
> wrote:
> > After a short discussion on the italian talk, I would move the
> discussion in
> > this list. After some tests  with OSRM, I missed the availability of a
> tag
> > to mark the continuos (or discontinued) line that divide the lanes in
> > several single carriageway.
> >
> > In my opinion this is an important indication to the routers to avoid
> > illegal turns across a road. A typical useful application case is a road
> > with many side road [2]. Actually the problem is solved with several turn
> > restriction relations, one for each side way. Tagging the main way with
> > "divider=solid_line" the problem would have been solved in a easier way,
> > also reflecting the real status of the road.
> >
> > Indeed a "Divider=solid_line" proposal [3] was already presented . I'm
> would
> > revamp such proposal.
> > What is your opinion ? Is there any router developer here ?
> >
>
> In my opinion it's best to treat legal separation (i.e. solid_line)
> the same way as physical separation, i.e. create two separate
> highways, one in each direction.
>
> /Markus
>
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