[Tagging] lanes=3 + lanes:forward/backward=1 for "semi-divided" roads?

Paul Johnson baloo at ursamundi.org
Thu Feb 16 13:39:50 UTC 2017


On Sun, Feb 12, 2017 at 11:52 PM, Marc Gemis <marc.gemis at gmail.com> wrote:

> On Sun, Feb 12, 2017 at 9:56 PM, Mark Wagner <mark+osm at carnildo.com>
> wrote:
> > I'd consider mapping it as a dual carriageway.  I don't know what the
> > law is in Pennsylvania, but here in Idaho, a doubled double-yellow
> > line is the legal equivalent of a physical barrier: you are not allowed
> > to drive across it for any reason.
>
> I would keep dual carriage way mapping for the cases with real
> physical barriers (such as guard rails or kerbs) or different surfaces
> (grass).
> IMHO, you loose valuable information by not mentioning there is a
> third lane in the middle.
> Emergency vehicles might want to know this, planning of very wide load
> transports might want to know this. Governments might need this
> information, so they know they can divert traffic over the middle lane
> in case of road works.
> There might be other applications that find this information valuable.
>

This tends to be my line of thinking as well.
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