As nobody has linked to it yet;
https://en.wikipedia.org/wiki/SPUI
Steve
On Sep 15, 2013, at 6:23 PM, Greg Morgan <[email protected]> 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 <[email protected]> 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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