Highway Off-Ramp Segment Question

The place to get information and ask questions about everything to do with properly and successfully editing the Waze Map.

Use this forum for all general editing questions, and the sub-forums for specific types of Waze Map Editor features.

Moderators: Unholy, bextein

Re: Highway Off-Ramp Segment Question

Postby PhantomSoul » Mon Jan 14, 2013 4:34 am

I agree that bow ties look weird in the client, particularly if you have it set to auto-zoom and you stop for a red light. So I try to avoid them unless improper u-turn instructions start to become repeat problems in a particular junction.
PhantomSoul
US Waze Champs
US Waze Champs
 
Posts: 1660
Joined: Wed Oct 10, 2012 4:00 am
Location: Union, NJ USA
Has thanked: 300 times
Been thanked: 498 times

Re: Highway Off-Ramp Segment Question

Postby hmarian » Mon Jan 14, 2013 1:50 am

Thanks for the explanation.
The concept of bow ties intersection is now clear to me.

My question regarding the two examples are related to the road type between the two parallel Northbound and Southbound. They are both a T junction to a parallel road segment, but I'm still not clear if it suppose to be a street type segment or a ramp type segment.

Please try to address my question in your answer.

Thanks,
Hagay.
hmarian
Waze Global Champs
Waze Global Champs
 
Posts: 4000
Joined: Tue Sep 24, 2013 9:08 pm
Location: Toronto, Ontario, Canada
Has thanked: 233 times
Been thanked: 1704 times

Re: Highway Off-Ramp Segment Question

Postby CBenson » Mon Jan 14, 2013 1:39 am

Spil wrote:If it is at a T-intersection, or if the crossroad is named the same on both sides of the split road, then there's no problem with naming the median segment the same as those segments.

Agreed, although if it as at one-way segment that ends at the T (as in the original examples), there's not much point to naming the segment either. The only time the segment name will be used in the original examples is in navigation instructions for the U-turns, if permitted.
CBenson
Waze Global Champs
Waze Global Champs
 
Posts: 10330
Joined: Wed Nov 03, 2010 9:13 pm
Location: Crownsville, MD, US
Has thanked: 1069 times
Been thanked: 2355 times

Re: Highway Off-Ramp Segment Question

Postby andrewkjs » Mon Jan 14, 2013 1:06 am

ottonomy wrote:Since your question about the applicability of bow-ties is still up was the air, I thought I would take the time to confirm my own thoughts on that. I created some temporary example roads out in the sticks, so I could fiddle with turn restrictions and make useful screenshots without possibly messing up someone's hard work.

This was a good explanation that matches what I had in my head, but didn't have the time to put down into text and screenshots. Thanks for taking the time to put it together, I'm adding your post into my Waze best practices folder for future reference.
andrewkjs
 
Posts: 142
Joined: Thu Feb 04, 2010 2:24 pm
Location: Petaling Jaya, Malaysia
Has thanked: 30 times
Been thanked: 31 times

Re: Highway Off-Ramp Segment Question

Postby Spil » Mon Jan 14, 2013 12:50 am

If it is at a T-intersection, or if the crossroad is named the same on both sides of the split road, then there's no problem with naming the median segment the same as those segments.

However, if the crossroad has different road names or city names on each side of the split road (for example, N. Main St. above the split and S. Main St. below the split), then you must leave the median segment as "No Name", so that the turn instructions will pick up the appropriate segment name from the next segment automatically.
Spil
 
Posts: 1320
Joined: Sat Jul 16, 2011 12:11 pm
Location: Upstate NY, USA
Has thanked: 107 times
Been thanked: 33 times

Re: Highway Off-Ramp Segment Question

Postby EECGeek » Sun Jan 13, 2013 11:28 pm

Another question, if you're not using a bow tie, should the segment be named, while it will not be seen on the map, it seems redundant in the interest of wasted bytes (unless it is necessary for some reason). Or does the name of a segment have a bearing on file size and or routing or anything else?

Greg
EECGeek
Waze Local Champs
Waze Local Champs
 
Posts: 90
Joined: Fri Mar 02, 2012 12:45 am
Location: Waltham, Quebec, Canada
Has thanked: 42 times
Been thanked: 20 times

Re: Highway Off-Ramp Segment Question

Postby ottonomy » Sun Jan 13, 2013 10:46 pm

It seemed to me that the early consensus in this thread was that example 2 was better for routing purposes. Obviously, if U-turns are specifically allowed on the minor highway there at the intersection of the ramp, then a small two-way section would be needed there.

Since your question about the applicability of bow-ties is still up was the air, I thought I would take the time to confirm my own thoughts on that. I created some temporary example roads out in the sticks, so I could fiddle with turn restrictions and make useful screenshots without possibly messing up someone's hard work.

As andrewkjs said, a bow-tie is not necessary at a T-junction for controlling U-turns.

The off-ramp segments have permission to make their turns onto the highway:
Intersections12.jpg
(40.03 KiB) Downloaded 467 times


The southbound segment of the highway can have a left turn restriction to prevent it from using the short ramp segment to make a U-turn, but if it's not a T-junction, and another street is inline with the ramp, then the southbound highway segment needs permission to turn left onto that street. The median segment has to allow a lefthand turn going north, because that is one of the allowed turns from the off-ramp. So now you have potential U-turn routing from the map, and no way to prohibit it without also limiting a legal left turn:
Intersections34.jpg
(40.56 KiB) Downloaded 467 times


Enter the mapcat bow-tie. With it in place, you can give the off-ramp segment and the highway segments all the turn permissions they need, but specifically restrict U-turns where applicable:
Intersections56.jpg
(40.59 KiB) Downloaded 467 times


Does this make sense?
ottonomy
Global Champ Mentor
Global Champ Mentor
 
Posts: 729
Joined: Thu Oct 11, 2012 6:31 am
Location: Los Angeles CA
Has thanked: 1309 times
Been thanked: 571 times

Re: Highway Off-Ramp Segment Question

Postby hmarian » Fri Jan 11, 2013 4:49 pm

So what is the conclusion?
Using example 1 or example 2?
hmarian
Waze Global Champs
Waze Global Champs
 
Posts: 4000
Joined: Tue Sep 24, 2013 9:08 pm
Location: Toronto, Ontario, Canada
Has thanked: 233 times
Been thanked: 1704 times

Re: Highway Off-Ramp Segment Question

Postby HandofMadness » Thu Jan 10, 2013 11:26 pm

hmarian wrote:Could someone explain the concept of bow ties


[ img ]
HandofMadness
Area Manager
Area Manager
 
Posts: 1802
Joined: Mon Apr 16, 2012 7:44 am
Location: Californialand, USA
Has thanked: 18 times
Been thanked: 375 times

Re: Highway Off-Ramp Segment Question

Postby hmarian » Thu Jan 10, 2013 11:14 pm

Could someone explain the concept of bow ties and how is it related to the question asked?

Any other thoughts so we could reach conclusion on this?

Thanks,
Hagay.
hmarian
Waze Global Champs
Waze Global Champs
 
Posts: 4000
Joined: Tue Sep 24, 2013 9:08 pm
Location: Toronto, Ontario, Canada
Has thanked: 233 times
Been thanked: 1704 times

Next

Return to Waze Map Editor

Who is online

Users browsing this forum: Baidu [Spider], Yahoo [Bot]