[OSM-newbies] Splitting streets into one ways--too much?

[Kenneth Pardue]

Yes, in this case there is a physical barrier.  On a semi-related note, on another part of town there is a 4 lane highway.  Parts of the highway are separated by a median, and other parts bring both eastbound and westbound lanes together, with a turning lane separating them.  That seems even more valid than the residential roads to split into two separate ways, but there isn't technically a barrier separating the lanes.  Make it two ways or merge into one where there is no physical barrier?  I'm thinking the former.


On Dec 8, 2010, at 5:05 PM, john at jfeldredge.com wrote:

> According to what Kenneth wrote, there IS a physical barrier between the two sides, the median he mentioned.
> 
> -------Original Email-------
> Subject :Re: [OSM-newbies] Splitting streets into one ways--too much?
> From  :mailto:stevagewp at gmail.com
> Date  :Wed Dec 08 16:09:51 America/Chicago 2010
> 
> 
> Hi,
>  IMHO, if there is no physical barrier, it's a bad idea to map the
> two lanes individually. Some reasons:
> 1) It renders badly. In every renderer. Spurious one-way arrows, the
> road comes out looking wider, you get the extra lines down the middle,
> ugly intersections...
> 2) Routers no longer know that you can u-turn anywhere.
> 3) You're losing the piece of information that the two lanes are
> physically contiguous. There should be some kind of relation binding
> them together, but none has been defined, afaik.
> 4) It's misleading to users - it looks like a divided road, when it's not.
> 5) Causes various inaccurate flow-on effects, like a turning circle
> being represented as a single way, rather than an "area".
> 
> I'd suggest not going down this road until we have some guidelines in
> place for how to do it properly, and avoid these issues.
> 
> Steve
> 
> On Thu, Dec 9, 2010 at 2:03 AM, Kenneth Pardue <kenneth at pardue.me> wrote:
>> I'm working in my local area using the new Bing imagery.  It really allows me to see much greater detail and to add that to OSM.  There are a number of residential streets in my locale that are separated by a median.  Traditionally, I've converted such streets into two one way lanes.  Of course this is particularly useful in areas like interstates or large highways, but I'm wondering if I'm taking it too far by doing it to the residential streets in my area?  At what point is an effort for absolute accuracy go to far?
>> 
>> See the area, and my edits, here: http://www.openstreetmap.org/?lat=31.27966&lon=-92.48732&zoom=17&layers=M
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> -- 
> John F. Eldredge -- john at jfeldredge.com
> "Reserve your right to think, for even to think wrongly
> is better than not to think at all." -- Hypatia of Alexandria
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