Most users did not follow the suggested route?

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Re: Most users did not follow the suggested route?

Postby CTGreybeard » Sat May 11, 2013 5:54 pm

I'm seeing an explosion of these MPs and it isn't making much sense other than the routing algorithm is screwed up. Many are routing down small lanes that are, apparently, completely the wrong direction. Of course we don't see the whole routes or destinations but some are blatantly incorrect.

And, then, there is this one: https://www.waze.com/editor/?zoom=7&lat ... s=33669360 where the route coming from the South on the Albany Post Road turns left AGAINST the one way highlighted. That segment was last updated on Feb 18 so either we are looking at really old data or routing is really messed up.
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Re: Most users did not follow the suggested route?

Postby ncc1701v » Sat May 11, 2013 10:51 pm

I see reverse connections on all three junctions in that triangle (http://www.waze.com/wiki/?title=Glossary#Reverse_Connectivity). Try fixing those (http://www.waze.com/wiki/?title=Community_Plugins,_Extensions_and_Tools#WME_Junction_Node_Fixer) and see what happens.
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Re: Most users did not follow the suggested route?

Postby CTGreybeard » Sat May 11, 2013 11:05 pm

I'm not running any scripts but I went and redid the turns at all three junctions. Maybe that fixed it?
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Re: Most users did not follow the suggested route?

Postby davipt » Sun May 12, 2013 3:17 pm

split the landmark discussion viewtopic.php?f=8&t=48957
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Re: Most users did not follow the suggested route?

Postby ottonomy » Tue May 14, 2013 9:54 pm

The fact that some of these MPs do point to actual correctable problems does little to convince me that they aren't still being generated by old data. It merely means that in those cases, no one caught the problem before. In the Los Angeles basin, I close between fifty and a hundred of that particular variety of MP every week. A great number of them turn up where alleys were previously set as service road type (no routing penalty difference from regular street segments) instead of parking lot or private road type. These are often in repeat locations, where I changed the road type myself in response to a prior MP or UR. If Waze were actually routing users down these alleys still, as the MPs suggest, then I would expect to see the occasional UR submitted by a driver, but I don't. One could argue that drivers don't bother to report, but the high frequency of URs popping up in places where the road type IS set wrong would back up my thesis. These MPs are still using outdated drive and routing data. Note that they always appear in red, as if they are aging map issues, never in yellow or orange, like newer ones do. I come upon an equal number of automatically generated "restricted turn might be allowed" MPs, and these always start out in yellow. There may be some question as to whether Waze will occasionally have a routing failure and send someone over a parking lot road segment mid-route, but I have documented occasions where these MPs show Waze routing over roads that have been deleted or separated well over a month before the MP shows up.

See my example in this post:
viewtopic.php?f=8&t=49135#p440491

What's most frustrating about these is not the fact that I have to waste time closing them again and again, but that newer editors who are unaware of the old-data issue find them and try to fix problems which no longer exist. This is a big problem in LA, where we have wave upon wave of new people trying out WME on a weekly basis. I find myself locking things which shouldn't need to be locked, all because Waze keeps generating these MPs where all the issues have been dealt with, and nary a UR ever shows up.
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Re: Most users did not follow the suggested route?

Postby AlanOfTheBerg » Tue May 14, 2013 9:58 pm

The vast majority is old, old data.
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Re: Most users did not follow the suggested route?

Postby davipt » Wed May 15, 2013 11:51 am

Here's an example of old data. The segment was last changed in February, can't recall it it was disconnected from the major road below on that day or even before. The suggested route sends south to the major, which is physically impossible for a long time.

Screen Shot 2013-05-15 at 12.50.00 PM.png
Screen Shot 2013-05-15 at 12.50.00 PM.png (963.02 KiB) Viewed 673 times
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Re: Most users did not follow the suggested route?

Postby Ayzmo » Wed May 15, 2013 6:36 pm

I just got one based on old data as well. Users were ignoring a road that hasn't existed in over a year.
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Re: Most users did not follow the suggested route?

Postby ncc1701v » Wed May 15, 2013 8:05 pm

Ayzmo wrote:I just got one based on old data as well. Users were ignoring a road that hasn't existed in over a year.

but ... that's a different kind of old data. If Waze is trying to send people over a road that hasn't existed for a year and WME complains that users are NOT taking it, that means Waze is wrong. (If WME complains that people were taking a NEW road it doesn't know about, that's a problem to ignore.)

No?
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Re: Most users did not follow the suggested route?

Postby jasonh300 » Wed May 15, 2013 8:29 pm

ncc1701v wrote:
Ayzmo wrote:I just got one based on old data as well. Users were ignoring a road that hasn't existed in over a year.

but ... that's a different kind of old data. If Waze is trying to send people over a road that hasn't existed for a year and WME complains that users are NOT taking it, that means Waze is wrong. (If WME complains that people were taking a NEW road it doesn't know about, that's a problem to ignore.)

No?


The issue is that the roads were changed or deleted a year ago. Before that, people were being routed via that deleted or changed road, and they were ignoring it. The data was being collected at the time, but there was no MP to report it. Now that the MP exists, it finds these problems in that ancient data and shows the error in the editor.

I haven't seen any instances of Waze trying to route on a road that has been deleted from the map.

Likewise, people have posted that these MPs show that users are being routed through parking lots that were changed to Parking Lot type segments months ago. But nobody has seen this happen in a LiveMap simulation or on the actual client...once again, old data. If these things were actually happening now, we'd be seeing URs as well as the MPs.
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