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<p>Hey Andrew,</p>
<p>I’m chiming in as I encountered this issue documenting the “cleaned up” Roads tagging guidelines. (<a href="https://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines/Roads">https://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines/Roads</a>)</p>
<p><br />The tagging guidelines (both prior to, and following cleanup) state it is good practice in Australia to tag every road with a maxspeed.</p>
<p>The early guidelines say that the implicit speed limits have not been widely adopted in Australia, but this no longer appears to be true.</p>
<p><span style="font-size: 10pt;">In use is both the maxspeed:type tag and source:maxspeed tag. Unfortunately, the earlier guidelines offers advice on the usage of the source:maxspeed tag that is contradictory to the global page. (It suggests local_knowledge to mark implicit speed limits rather than AU:urban). The maxspeed:type tag does not have this contradiction.</span></p>
<p>I am not sure if leaving the maxspeed blank (or using a non-numeric value) would be a good idea; using a non numeric value in maxspeed seems to be much less preferred globally than the alternative methods. I documented maxspeed:type rather than source:maxspeed following a discord discussion, but I believe either of those two schemes are preferable to using maxspeed=AU:urban.</p>
<p>Dian</p>
<p id="reply-intro">On 2022-04-20 13:45, Andrew Hughes wrote:</p>
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<div dir="ltr">Hi All,
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<div>First, I thought the tagging guidelines were "don't tag unless it's a non-default value" (my language to describe this might be inaccurate, feel free to improve). If this is true, then I shouldn't tag rural ALL roads with maxspeed. It's only those that are "non-default".</div>
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<div><strong>Can anyone please confirm the above please?</strong></div>
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<div>Secondly, it does look like there is a tagging for implicit (speed) values as per <a href="https://wiki.openstreetmap.org/wiki/Key:maxspeed#Implicit_maxspeed_values" target="_blank" rel="noopener noreferrer">https://wiki.openstreetmap.org/wiki/Key:maxspeed#Implicit_maxspeed_values </a></div>
<div>maxspeed = AU:urban</div>
<div>maxspeed = AU:rural</div>
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<div>I believe that the above is better than tagging 50kph, 60kph or 100kph - because a change in legislation (as has happened in the past) can change is without tags needing to be updated.</div>
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<div>But that all being said, I would still be tagging all roads and not just those that are "non-default" on the ground. <strong>Which contradicts the first point (if it is true that is).</strong></div>
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<div>This feels like a distinct gap in OSM (as others have pointed out). But this is one I would like to know how to deal with.</div>
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<div>Perhaps area's could be tagged with maxspeed=AU:urban or maxspeed=AU:rural to define "implicit speed areas"? I think this might be what is missing. <strong>Thoughts?</strong></div>
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<div>Thanks for reading</div>
<div>AH</div>
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<div class="v1gmail_attr" dir="ltr">On Wed, 20 Apr 2022 at 10:30, Graeme Fitzpatrick <<a href="mailto:graemefitz1@gmail.com" rel="noreferrer">graemefitz1@gmail.com</a>> wrote:</div>
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<div>In regard to defaults, the default 50kph Qld (Oz-wide?) urban residential limit should apply around here, & sure enough, most streets are 50. But we also have some residential streets posted as 40, 60 & 70, as well as 40 conditional school zones.</div>
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<div>So I assume (using that terrible word! :-)) that actually tagging a speed limit on a road overrides the default?</div>
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<div>& while I've seen reference to Default Qld Residential speed limit on the map, I've also noticed while driving around that OSMAND isn't showing a speed limit?</div>
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<div dir="ltr">Thanks
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<div>Graeme</div>
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