Gt North Rd, New Lynn

by **pcp192** » Sun May 06, 2012 1:04 am

Hi all

Can anyone else figure out what the problem is with this intersection:
https://world.waze.com/editor/?zoom=6&l ... s=58376478

There's a growing number of Incorrect Junction and Driving Instructions being logged there and from the editor I can't see why.

Let me know if you figure it out.

Cheers
Paul

by **amartinnz** » Mon May 07, 2012 11:57 pm

It looks like Waze keeps trying to route people via Nikau and Rimu streets, rather than staying on Great North Road and Rata Street.

There is not much we can do to influence Waze on why it thinks this route is quicker / better than the 'proper' one, other than letting it learn from users routing the correct path.

by **pcp192** » Tue May 08, 2012 5:59 am

I had thought that might've been the case. I think the same problem has been happening at gillies ave in Newmarket. Let's wait and see what happens then.
Cheers

by **Virgil_nz** » Thu Sep 13, 2012 1:00 am

Interesting, I thought I had just fixed an issue at this intersection, and then I find this thread :-)

From the same link as above, a user approaching from the left was routed left onto the Rata St slip rd, then immediately a hard right across the traffic onto the slip road to re-join Great North and proceed to the right.

I figured that turn should not be allowed and disabled it, and thought hey that was easy .. but it sounds like there has been issues here for a while.

I might go and drive it again myself to see what it tells me now.

Cheers

by **david_merriman** » Mon Sep 17, 2012 2:18 am

Pardon me for showing my ignorance ("that's ok, David, go right ahead...") but not knowing the area in question, I had a couple of questions (probably completely unrelated to the issue(s) in question):

1. I notice that Pine St is completely inaccessible from Great North Rd, with turn restrictions on both segments that join to it. Is that actually the case ?

2. I also noticed that there's no right turn allowed from Rimu St on Rata St. True ?

Regards,
David

by **Antmannz** » Mon Sep 17, 2012 7:01 am

The problem with this intersection (and many others mapped in Auckland) are the slip roads.

The additional junction nodes created are adding a penalty to the navigation. Because the slip from Titirangi into Gt Nth does not align with the slip from Gt Nth into Rata and because of the likely average time spent in the sector with the traffic lights, Waze will see the slip roads as being massively faster by comparison.

I've noticed that many junctions around Auckland have had the slip roads mapped into Waze. Not only does it cause the sort of problems shown here, but many give incorrect TTS instructions (this one is OK as all the slips have been named with the road they lead into).

IMO slip roads as shown above are unnecessary; you get enough warning far enough out to realise that you have to move into either the left or right lane if you're turning. I would personally like to see them disappear as I don't think they add any value, but I'm still too much of a newbie to be starting this without further discussion amongst some of the older and more regular hands (eg. pcp, ispy, etc.)

And to answer David's questions:

1. You can turn into Pine from Great North Rd (including the right-hander, there is a lane for it - but it is restricted during rush hour): Fixed.
I've enabled the right turn into Pine, being that it's only a no-no for 2 hours per day and as a cul-de-sac I figure it should be OK.

You cannot turn right from Pine onto Gt Nth Rd: Fixed

2. A right-hander from Rimu into Rata is disallowed. This is correct.

by **pcp192** » Wed Sep 19, 2012 8:44 am

I agree that the slip roads in some cases do cause problems - I'm guilty of adding a few of them as when I first started editing it seemed from other intersections that this was the correct thing to do.

It seems that in some (if not many) cases they really aren't necessary and I agree that things might be simpler if we get rid of them.

Some navigation systems give detailed lane directions at all intersections in which case it would be necessary to have these but I'm inclined to agree that Waze doesn't need them.

I don't think we should embark on a wholesale plan for deletion but give this thought where there's an intersection with a problem.