how to edit two ways roads junctions?

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Re: how to edit two ways roads junctions?

Postby slandrum » Tue Feb 04, 2014 5:52 pm

No, it's 15m in the US (and presumably Canada, since it's on the same server) as well. I've had to widen intersection segments to just over 15m to allow U-turns, and shortened some to just under 15m to prevent U-turns, and the changes worked as desired.
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how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 1:01 pm

Hello Everyone,

I have a general question, not related to any specific roads... I just want to know what to do before doing something wrong...

How should I edit two ways roads to prevent not allowed u-turns?
If I have a road like this, with all turns allowed... but u-turn from east/weast road to west/east road is not allowed in the real world. What should I do to make sure that waze does not chose to route with a u-turn?
http://imgur.com/yGbSCI3

For me, the easy fix would be this :
http://imgur.com/m2gv2sE
(remove one segment, replace it with the red one and edit the junction to make sure u-turn is not allowed).

Is this something that should be done in this case or I should leave everything as is because it's fine that way?
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 2:24 pm

AndyPoms wrote:Well, first off, please ensure both roads meet the Criteria for being split.

Then, look at the Junction Style Guide.

Also, the short segments in the middle of the intersection should be unnamed ("No Street" checked) & less than 15m (10m in some places). Those two items should prevent the U-Turn automatically.


I did know for the criterias...
I'm level 1... and I don't want to mess with splitting roads... I will report a possible error to higher level user if I think it's needed..

I also read the junction style guide... but I did not find anything for my specific example. So thank you for those precision...

just to understand better, can you tell me what you would do here :
https://www.waze.com/editor/?zoom=6&lat ... s=68373381

leave all segments as is or rename some segments (or all, including yellow) to "no street"?

segments are 16m long... and if we look to other segments nearby, some have the "no street" checked for a similar configuration.
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 2:52 pm

davipt wrote:15m on ROW seems to be the limit. I've just fixed a split road with three u-turn connections and waze sent me to the third one because the first two were 14m and the third 16. :D


so to prevent any u-turns that are not allowed, when possible we should move bigger segments to make sure that small segments are less than 15m?
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 3:29 pm

roads are working well in this area (except maybe for the possible u-turns)... and Google maps has the same configuration in this section.

I will look at this and change as little as possible to make sure no segments information are lost.
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 3:46 pm

Google Maps is far from perfect... but usually, it very good in North America (at least where I've used in Canada and the USA).
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 5:56 pm

AndyPoms wrote:Wow, that area is a mess... Most of the roads that are typed as "Street" shouldn't be split in that area.

If you follow Boul du Séminaire Nord south from that intersection, you'll see several different styles of junctions. All of which can be greatly simplified by unsplitting the side streets (but this isn't something a level 1 should tackle with out assistance, as the work has to be done in a particular method to preserve some underlying data.

Canada is on the NA Infrastructure (along with the US), and I think that the connections have to be less than 10m to prevent a U-Turn, but I'm not sure...


thanks for your feedback...

do you think it's worth it to "report" this area to the proper forum section so some that knows what he's doing could fix everything?

I just fixed some obvious errors (like u-turn not allowed or not recommanded at all for "important" segments)... but I don't want to mess with unsplitting segments (at least not for now).
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 6:26 pm

AlanOfTheBerg wrote:My gut reaction is to say that a bowtie may be a good way to deal with this.


you mean linking the segments from the side streets right in the middle or farther point of the main split street?
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 6:56 pm

AlanOfTheBerg wrote:Yeah, all segments meet at a single junction. Not everyone likes them, but they do work very well.



I did this once for a split road that had the two segments more than 15m away (it was not possible to keep them under 15m)... and it worked really fine.

Waze should add a section for this type of junctions in the wiki...
it would be quite easier if we had a clear picture of what should and shouldn't be done in those situations.
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Re: how to edit two ways roads junctions?

Postby zadigre » Tue Feb 04, 2014 7:12 pm

AlanOfTheBerg wrote:
zadigre wrote:Waze should add a section for this type of junctions in the wiki...
it would be quite easier if we had a clear picture of what should and shouldn't be done in those situations.

https://www.waze.com/wiki/Junction_Style_Guide#Bow_tie_intersections


this is simple and clear... but it does not cover the situation when two dual carriageway roads intersect.
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