[OSM-talk] Tagging continuous flow intersections

[David Paleino]

On Mon, 24 Aug 2009 12:42:53 -0400, Richard Weait wrote:

> On Mon, Aug 24, 2009 at 12:06 PM, David Paleino<d.paleino at gmail.com> wrote:
> > There's no physical barrier, and the lanes are divided by continuous lines
> > -- that would be a no-changing-lanes restriction, but I'd still be
> > uncomfortable with drawing two separate ways -- that doesn't reflect real
> > world.
> >
> > Satellite image:
> >
> >  http://maps.google.com/?ie=UTF8&ll=38.12436,13.355808&spn=0.001091,0.002411&t=k&z=19
> >
> >  (the street from NW is the one from S in my drawing --
> >  http://imagebin.ca/view/SjGkG4.html )
> >
> > If you zoom in, you can clearly see the horizontal signals (at least at the
> > NW street, there's some shadow hiding those in the SW one).
> >
> > If there are no other suggestions, I'll try to think at something :/
> 
> You also referred to http://en.wikipedia.org/wiki/Continuous_flow_intersection
> 
> I don't remember ever seeing one of these in the wild.
> 
> I don't think that the intersection that you are looking at is a
> continuous flow intersection as described in the wikipedia article.
> It appears to be a simple cross junction of two one way roads.  Is
> that correct?  If so I would map it with a single node at two
> crossing, one-way, ways.

You can't obviously see the vertical signals from the aerial imagery.

In the street coming from NW, there is a "continuous flow to left" -- that means
you can go left even with a Red-light-signal.

In the street coming from SW, there is a "continuous flow to right" -- you can
go right regardless of the traffic signal once again.

They *are* CFIs.

Kindly,
David

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