<div class="gmail_quote">On Wed, Jun 29, 2011 at 5:03 PM, Richard Fairhurst <span dir="ltr"><<a href="mailto:richard@systemed.net">richard@systemed.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">Toby Murray wrote:<br>
> I mentioned something about cardinal direction relation roles on<br>
> IRC last night and I think it was RichardF thought they were<br>
> silly because he had no concept of a "north/south" vs "east/west"<br>
> highway.<br>
<br>
</div>Probably not me, but you're right, and it's not a question we have to worry<br>
about in the UK anyway - we don't need highway route relations because any<br>
road only has one number.<br>
<br>
FWIW, and you should absolutely not listen to me because I'm a long way away<br>
and it's up to you guys to sort yourselves out... but I'd create a separate<br>
relation for each direction (i.e. one northbound relation, one southbound<br>
relation) and not bother with roles at all. It's simpler conceptually,<br>
simpler for the newbie to edit, simpler to process. (If you wanted to, you<br>
could then have a super-relation for the two relations, though personally I<br>
wouldn't see the need.)<br></blockquote><div><br>I've been in favor of a single relation for both directions, however I think I'm questioning that now.<br>* Where a road predominantly consists of dual carriageways (such as US Interstates), I think there's no trouble using a single relation, and the north/south/east/west roles for the appropriate members, however two relations would be just fine with me as well.<br>
* For roads that consist predominantly of single ways, with perhaps a few divisions here and there such as near intersections, I think a single relation makes the most sense, and forward/backward roles are fine if they are helpful.<br>
* For those roads which are more evenly split between being dual and single carriageways, I think two relations might make more sense for reasons of simplicity of editing.<br><br>-Josh<br></div></div>