<div dir="ltr">On Tue, Dec 10, 2013 at 6:25 PM, Martijn van Exel <span dir="ltr"><<a href="mailto:martijn@openstreetmap.us" target="_blank">martijn@openstreetmap.us</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
I think discussion can only be useful if and when we have a common<br>
understanding of what 'trunk', 'primary', 'secondary' etc. mean to us.<br>
I don't think we're anywhere close to that, looking at the various and<br>
partly mutually contradictory wiki pages on the topic:<br></blockquote></div><br></div><div class="gmail_extra">I think this part of the tagging scheme that is the most puzzling issue for US mappers. In the Phoenix area, <a href="http://www.openstreetmap.org/#map=11/33.5683/-112.0901">http://www.openstreetmap.org/#map=11/33.5683/-112.0901</a>, I've used primary as a way of showing travelers what is the best way to get through all of our mountain preserve areas. Since the traffic has to funnel through these passages the amount of traffic that these roads has to handle probably lines up with what a primary road should be.<br>
<br></div><div class="gmail_extra">I use residential for 0 to 25 mph residential roads. That tag seems obvious.<br></div><div class="gmail_extra"><br>I use tertiary for 30 to 35 mph roads. I see most of these types of roads as connecting residential subdivisions. These roads tend to have bike lanes too. I also see dashed yellow lines or two solid yellow lines as another indication of changing the road to tertiary in mostly residential areas.<br>
</div><div class="gmail_extra"><br>I use secondary for 40 to 45 mph roads.<br></div><div class="gmail_extra"><br>The roads that I have marked as primary are any where from 35 mph to 50 mph.<br></div><div class="gmail_extra">
<br>I use motorway for the major concrete highways.<br><br></div><div class="gmail_extra">This gives me a plan that I can follow with some consistency even if I cannot say that it is the correct thing to do. I ignore JOSM validation on this question because there is no highway reference for tertiary, secondary, and primary in most cases where I have used the tags. However, leaving a more than 25 mph road as residential seems like the wrong thing to do.<br>
<br>I hope this helps,<br></div><div class="gmail_extra">Greg<br> <br></div></div>