Example of Reverse connection causing issues

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Example of Reverse connection causing issues

Postby rottielover » Wed Dec 12, 2012 1:34 pm

Permalink: https://www.waze.com/editor/?lon=-90.87394&lat=38.81048&zoom=5&layers=BFTFFTTTFTTTTTTTTTTTTFT&segments=62382737

User Problem report:
Type: General error
Description: I 70 at wentzville MO. keeps wanting me to exit again
Reported on: December 03


If you don't have WME Color Highlights, PLEASE install it! (otherwise you wont' see the reverse connection nodes in this area.)

I thought this was a pretty good example to post.
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Re: Example of Reverse connection causing issues

Postby rottielover » Wed Dec 12, 2012 1:37 pm

and another just down the highway a bit...

https://www.waze.com/editor/?lon=-90.82895&lat=38.8068&zoom=5&layers=BFTFFTTTFTTTTTTTTTTTTFT&segments=26680502

This user problem report came in as "wrong driving directions".

It seems to me, and this is just a guess, that when the user's GPS is off a bit AND the client runs into several RevCon nodes in a row (like we have in both examples), it causes the client to think it's on the outer road, or causes it to want to do "on / off" routing over the exit / entrance ramps.
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Re: Example of Reverse connection causing issues

Postby Machete808 » Wed Dec 12, 2012 2:58 pm

We have those littering our area, in spots. I remove them where I have the permission levels in the hopes that it will help some of our goofy routing. I also assume that Waze tries to route around areas like this, but it would be cool to understand the effect of errors like this.
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Re: Example of Reverse connection causing issues

Postby rottielover » Wed Dec 12, 2012 3:19 pm

Something else I've noted in area's that have a lot of revcon nodes around. In WME Highlights look at your avg road speeds.

I've found segments reporting that wazer's were averaging way too high of speeds over short segments.

So far I find these only near U-Turn and Reverse Connection nodes. Total guess on my part, but I think when Waze sees these revcon's it's processing the data as though the user went back and forth over that segment (IE if a East West road Point A to Point B and back again). Then it processes the GPS data and calculates as though the user took A -> B ->A -> past B when in fact the user only went A -> past B.

Is it possible to ask a developer to look into that / is this already a known thing?

If so, will waze automatically fix these segments with "light speed" settings (over time as the correct data flows in), or are those numbers so far off it's un-correctable? (IE should segments with VERY bad data be deleted and re-created??)
Last edited by rottielover on Wed Dec 12, 2012 3:43 pm, edited 1 time in total.
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Re: Example of Reverse connection causing issues

Postby rottielover » Wed Dec 12, 2012 3:30 pm

https://www.waze.com/editor/?zoom=7&lat=38.79663&lon=-90.75718&layers=BFTFFTTTFTTTTTTTTTTTTFT&segments=26666889
Average speed for segment
A->B: 90km/h (55.9mph)
B->A: 18km/h (11.2mph)


This is a one way segment B->A . It's 46 meters long, and has 90 deg turns at both ends. I highly doubt anyone is doing 56 mph the wrong way on this short segment.

I have noted that the WME Color Highlight script seems to have a bug that puts the decimal point in the wrong place as well. You'll see 4000 mph when it should be 40.

However I am still finding segments that have skewed speeds.
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Re: Example of Reverse connection causing issues

Postby Machete808 » Wed Dec 12, 2012 3:45 pm

I wish I knew how reverse connection and other errors are caused, so I don't create new ones!
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Re: Re: Example of Reverse connection causing issues

Postby Kuhlkatz » Wed Dec 12, 2012 3:50 pm

vickimachado wrote:I wish I knew how reverse connection and other errors are caused, so I don't create new ones!



QW any junctions you create and then explicitly set restrictions after that. It's the only way.
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Re: Example of Reverse connection causing issues

Postby Machete808 » Wed Dec 12, 2012 4:06 pm

Thanks.

The instructions on correcting errors displayed by the highlighter script says only to hit the "Q" to begin the reset process. Is the "W" necessary, too?
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Re: Example of Reverse connection causing issues

Postby rottielover » Wed Dec 12, 2012 4:16 pm

vickimachado wrote:Thanks.

The instructions on correcting errors displayed by the highlighter script says only to hit the "Q" to begin the reset process. Is the "W" necessary, too?


Q = keyboard shortcut for the "Disallow all turns" button
W = keyborad shortcut for "Allow all turns" button

The fix for these is to dis-allow , then allow the turns and set the proper turn restrictions.

I made a YouTube video on how to do it:
http://www.youtube.com/watch?v=IFNXGQjA4kc
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Re: Example of Reverse connection causing issues

Postby jasonh300 » Wed Dec 12, 2012 4:25 pm

vickimachado wrote:Thanks.

The instructions on correcting errors displayed by the highlighter script says only to hit the "Q" to begin the reset process. Is the "W" necessary, too?


Where did you see these instructions? There's a script in beta testing that uses Q differently than the native function of Q in the editor.
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