[Talk-us] SPUI mapping

[Steve Coast]

As nobody has linked to it yet;

	https://en.wikipedia.org/wiki/SPUI

Steve

On Sep 15, 2013, at 6:23 PM, Greg Morgan <dr.kludge.gm at gmail.com> wrote:

> 
> Thanks for the help in the Phoenix area.  I've puzzle on how to map these interchanges.  Here's some other examples just down the road from your example.  This example is of how the SPUI is typically mapped but seems lacking http://www.openstreetmap.org/#map=19/33.65519/-112.00010.  Here's one of my attempts with a focus on traffic light placement
> http://www.openstreetmap.org/#map=18/33.67301/-111.97759.  The lights hang off the freeway bridge put I placed them at the stop lines on the pavement.  The additional junction and routing relations are a nice plus in your example.
> 
> Note that we have had one mapper in the area that removed highway crossings because he thought that they were excessive.  I wonder what he will do with turn restrictions?  I don't know if his feelings are based on the way iD or Potlach displays these types of features.
>  
> Regards,
> Greg
> 
> 
> 
> 
> On Sat, Sep 14, 2013 at 7:52 AM, Martijn van Exel <m at rtijn.org> wrote:
> Hi all,
> 
> Here in Utah, we have a DOT that is really into SPUIs (Single Point
> Urban Interchanges). They are supposed to increase traffic flow in
> high volume freeway to surface interchanges.
> 
> Here's an example:
> http://www.openstreetmap.org/?#map=19/33.62963/-111.89021 (not in
> Utah)
> 
> This is one I (re)mapped yesterday. I try to stay close to the
> situation on the ground, the result being a lot of turn restrictions.
> I have also seen situations where all the ramps and connectors come
> together at the center, easier to map I guess.
> 
> I am looking for opinions on how to map these complex interchanges.
> Could a few of you have a look at what I did and comment? Thanks.
> 
> --
> Martijn van Exel
> http://oegeo.wordpress.com/
> http://openstreetmap.us/
> 
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