"Physical divider" vs 2 1-way roads?

[Mxx]

I'm sorry but I couldn't find this in the guide for Road attributes.
What are the rules regarding when to draw 2 separate 1-way roads and when to use "Physical divider" attribute? For example Neptune Avenue or Ocean Parkway (1 intersection to the right of this one)...
Shouldn't all these be combined into a single road with "Physical divider"?

[zxrayz]

Personally I like the physically divided roads because when you look at the map view you can see where you can and can not access road on the other side of the highway (if the map is drawn correctly).  For example there is an entrance to a shopping center to the north of the divided highway in the view posted above which can not be accessed from the east bound lane. If this was drawn as a combined road, you would not know that you could not enter these other entrances to the shopping center from just looking at the map (of course it would be obvious on the sat view and routing directions should not turn over a physical divider), but looking at the map view could be a problem.

I notice that Ocean (Surf Ave) splits when it hit the physical divider farther south also.

[Mxx]

On Thursday, May 12, 2011 3:35:42 AM UTC-4, zxrayz wrote:

Personally I like

Is there an official guide/instructions of how to handle this? Something more than somebody's personal preference.. If your logical conclusion is an accepted norm, then what would be a situation where to actually "Physical divider"?
 

I notice that Ocean (Surf Ave) splits when it hit the physical divider farther south also.

 

Going south yes, but what about going north? almost throughout its whole length of Ocean Parkway it doesn't have physical curb dividers other than an occasional stripped lane and a turn pocket. Same with Coney Island Avenue.

[rkhare]

This is a major issue I have faced in my city as well. Most of the 4 / 6 lane roads with physical divider were drawn as 2 - 1 way roads. On maps they look more beautiful but I personally believe as well as per the user guide this is not the correct way.

However adding it as a single road with physical divider has 1 major issue. On intersections where only 1 way turn is possible because there is no gap in dividers, we have to frequently use turn restrictions which becomes a pain at times where there are too many intersections without gaps in divider.

[Andres]

To answer your question, there used to be a section on the Help Guide about splitting roads where this distinction was made, but I guess it was removed in the past few months for the Columbus Redux update. There is no right or wrong answer. A road marked with 4 lanes, a physical divider attribute and the appropriate turn restrictions set is functionally equivalent to a 2-lane split road. Obviously a split road is visually more accurate so preferably you would want to draw it as a split road. There are situations, for example, where the satellite imagery is not accurate enough to draw a split road, even if there is a physical divider. in this case, a single road is drawn.

As a person note, zxrayz is spot on. You may want to be less dismissive of someone who's freely trying to help :)

[Mxx]

My reply was in no way dismissive of zxrayz. I'm sorry if it sounded like that. I'm just looking for a more official definition of this issue than somebody's personal preference..

[Raza]

Hi Mxx, zxrayz, rkhare and Andres,

I agree with zxrayz and Andres here, to add a bit more:

Ideally, we would like all roads separated with a physical divider to be drawn as split roads (two separate roads), with the "Divider" attribute set to "No divider".

However, when the satellite imagery is unclear or if you are unsure, you can use the "Divider" attribute as appropriate. Learn more.

Cheers,

Raza

[max adoko]

Hi,

Personally i have been drawing these roads based on the intersection and turn restrictions.

The roads with Physical dividers i draw them as split roads and if there is a turn segment present, i draw it as well.

For those without physical dividers, i try to note traffic directions and indicate accordingly.

This is i believe the tricky and complicated section of google Map Maker as you have to use "directions" tab to see the traffic flow.

When the roads intersect at traffic Lights, I get problems drawing this. Like here
http://www.google.com/mapmaker?gw=39&fid=0x177dbb87e7c7e309:0x84b95dfbb0de91c5

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