Routing off/on highway instead of staying on

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Re: Routing off/on highway instead of staying on

Postby Spil » Wed Jun 06, 2012 6:39 am

invented wrote:I'm kind of stumped as to why it's routing people on the ramps. Cartouche says the freeway has an average speed of 113 km/h, the ramp segments are all lower than that, and the ramp segments together are longer than the freeway adjacent. So it must have been some heavy traffic.

WYSINWYG. ;) The speed data that shows in Cartouche is not what is used by Waze routing; the actual speed data that is used in its calculations is much more complicated, based on the segment's average speed at that time of that day of the week.
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Re: Routing off/on highway instead of staying on

Postby Mike-1323 » Tue Jun 05, 2012 4:08 pm

AggieJM wrote:I wouldn't expect it to use the ramps since the additional junction and slower speeds should make the highway the preferred choice.


The junction should add a penalty, but the speed on the ramp segments is probably pretty close to the main travel lanes since poor gps location will actually place some wazers on the ramp when they're traveling at full speed in the main lanes. Plus, I'm not convinces that traveling straight through a junction adds much of a penalty. :?
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Re: Routing off/on highway instead of staying on

Postby invented » Tue Jun 05, 2012 6:20 pm

I'm kind of stumped as to why it's routing people on the ramps. Cartouche says the freeway has an average speed of 113 km/h, the ramp segments are all lower than that, and the ramp segments together are longer than the freeway adjacent. So it must have been some heavy traffic.
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Re: Routing off/on highway instead of staying on

Postby invented » Mon Jun 04, 2012 9:26 pm

AggieJM wrote:Thanks guys!

Are those turn restrictions something that are required to make it work properly? Or should it not route off of the road that way by default. Obviously it's not a truly restricted turn, but I can see how adding the turn restriction will solve the problem.


I noticed that the entire stretch of that freeway has all turns allowed at the ramps, so this is bound to happen if Waze's routing algorithm determines it is marginally better to exit and enter back via the ramps. Adding a turn restriction at the ramp will add a strong penalty to using that route and more favour the mainline freeway.

Also, any particular reason you're using Major Highway there and Freeway to the east?
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Re: Routing off/on highway instead of staying on

Postby invented » Mon Jun 04, 2012 8:51 pm

Add a turn restriction to disallow the 'straight ahead' movement here:

https://www.waze.com/editor/?zoom=5&lat ... s=63628152

And here:

https://www.waze.com/editor/?zoom=5&lat ... s=50209292

While you're at it, the street underneath appears to have no name.
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Re: Routing off/on highway instead of staying on

Postby gettingthere » Tue Jun 05, 2012 7:43 pm

AggieJM wrote:Based on the feedback, it sounds like this is something that may need to be refined in the route calculation logic, but we can use the restricted turn as a solution for now.


Exactly. It's a proven workaround.
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Re: Routing off/on highway instead of staying on

Postby gettingthere » Tue Jun 05, 2012 5:24 pm

Beware that not all Waze editors are aware of this workaround. So it's possible another editor may come by and re-enable the turns you just restricted since the straight through ramp to ramp my technically be legal.

Also, I believe Waze previously made some adjustments in the routing to try to avoid this. Although their 'fix' may depend on some type of naming requirements in regards to city name. I don't remember exactly... You may be able to find these details via searching the forum and/or Wiki.
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Re: Routing off/on highway instead of staying on

Postby gettingthere » Tue Jun 05, 2012 4:29 pm

We have seen this issue many, many times. The recommendation to disable the straight through from highway exit ramp to highway entrance ramp is the best solution at this time. We have good evidence that this is an effective work-around for this issue.
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Re: Routing off/on highway instead of staying on

Postby F1Lee » Sat Jul 27, 2013 1:13 pm

AggieJM wrote:Thanks guys! I've made the changes to the ramps to disable the straight-through path on the ramps. I closed all the URs along that section as well that referenced this issue, since it looks like it's been a problem for a while.

This was my first time through the area running Waze and the rest of the route was pretty sound.


Although this "fixs" the issue you have, it creates another problem. Editors are software restricting a legal motor vehicle move.

If one where to accidentally take the exit, and needs to route back on the highway. Countless other occurrences could happen to require to need to return onto the highway. Not only that, it's LEGAL to do so, and should be allowed.

Based on principle, Waze should be allowed to route you back onto the highway from an exit ramp.

The core problem is in the Waze code and that's where the fix needs to be done. Wouldn't you agree?

I've looked for ways to report to Waze, code issues, but never can see them. How does one do this? I am not a fan of user "fixes" in software to avoid core software issues. Waze needs to do their job and make good software.
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Re: Routing off/on highway instead of staying on

Postby cdombroski » Mon Jun 04, 2012 8:18 pm

It seems to me you could fork the exit ramp just before it ends, placing the junctions on either side of the on ramp. Then regular turn restrictions would prevent routing towards the on-ramp (the right ramp is not allowed to turn left towards the on-ramp and vice versa).
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