why no left turn at intersection

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Re: why no left turn at intersection

Postby Machete808 » Tue Jan 28, 2014 1:16 am

Agree that some adjustment to the algorithm is needed. We've been getting the same complaints about being directed the long way around, frequently to avoid a left turn.

Problem is, sometimes Waze is right, but sometimes the difference would be so minor that it's not worth the headache of doing all the extra turns, etc. Glad to hear they're contemplating some threshold, like a 30-second difference, before routing people people in some odd way.
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Re: why no left turn at intersection

Postby Liashi » Sat Mar 29, 2014 4:59 pm

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Re: why no left turn at intersection

Postby jstrangfeld » Thu Sep 26, 2013 5:06 pm

Ok maybe someone could enlighten me about this....
https://www.waze.com/editor/?lon=-96.85 ... TTTTTTTFTT

Looks like the user starts out on the westside of a business on vicksburg street and wants to eventually end up on Inwood Road South.

Rather than going north on Vicksburg and west onto Lupo. Waze guides him south on Vicksburg, west on Burgess then north on memphis just to end up turning west onto Lupo just one block further.

What am I missing?
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Re: why no left turn at intersection

Postby jemay » Mon Mar 25, 2013 6:29 am

I have resolved things like this by rebuilding each junction node (disconnect each segment and create a new junction node (don't drag the old junction back in). After that I never got the u-turn route again...
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Re: Screwy routing

Postby HandofMadness » Sat Aug 17, 2013 7:46 pm

Usually happens in places where there's a long red or rush hour backups for going straight or left, but right turns are quick due to turning on red.

I've been seeing a ton of these the last two or three days here in SoCal. Seems Waze adjusted something on their routing server to make it more prone to "U turn" routing than normal.
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Re: why no left turn at intersection

Postby frf79 » Mon Nov 25, 2013 9:28 am

Found another one today. This is a pretty complex intersection. Instead of directing the driver to the 1960 service rd to turn left on to I-45 it directs them under I-45 and uturn them back to I-45. It looks like the issue is at the uturn itself but I am not sure. Let me know what you all think. I cannot edit it due it being lock at rank 5.

https://www.waze.com/editor/?lon=-95.42679&lat=30.02198&zoom=5&layers=TBFTFFTTTTFTTFTTTTTTTTTTT&env=usa
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Levels and ramps and bad routing oh my!

Postby dctdye » Thu Mar 28, 2013 7:24 pm

https://www.waze.com/editor/?zoom=6&lat ... 2,61661253

So the highlighted segments are all set as level -1. I-20/59 is level 1, and Mcfarland is level 0. I'm pretty sure the -1 level is why it told me to go north of the ramp to the little median crossover, turn left and turn left again to get on interstate instead of taking the ramp like any sane person. Before I submit the unlock, I just wanted to confirm that all ramps should be set to level 0 and to see if that should be the routing error.

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Re: why no left turn at intersection

Postby CTGreybeard » Sun Aug 18, 2013 8:13 pm

AndyPoms wrote:That intersection in Torrington has been causing issues for a while - I finally removed & rebuilt that segment of Christopher Rd as it was showing REALLY bad speed data (like 2mph bad)... Give it some time.

Ah, I didn't think of the speed data on that segment. It will be interesting to see how it develops.
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Re: why no left turn at intersection

Postby CTGreybeard » Sun Aug 18, 2013 7:22 pm

And another today ... here

Edit: It appears that this segment was created on Aug 10. The live map routes through the long way also and avoids Christopher Rd even though it shows on the map.
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Route off then onto same highway

Postby CTGreybeard » Sun Aug 18, 2013 6:35 pm

I've seen many UR's here where the driver is told to turn off the highway, around the roundabout and back onto the same highway.
Screen Shot 2013-08-18 at 2.19.15 PM.jpg
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But if you look at the green trace in this shot:
Screen Shot 2013-08-18 at 2.27.06 PM.jpg
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it appears that it thinks he is on the wrong lane, driving South in the Northbound lane. But that right turn that he would have to take is restricted properly.
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