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<p>Hi Cleary,</p>
<p>Two points:</p>
<p>Paint isn’t a barrier. Vehicles can, and do, traverse over paint; it’s legal in many cases if there is a road blockage, for example. Being unable to change lanes doesn’t make a single road into two roads. If I can’t merge left then I’m not travelling on a different road than the car next to me.</p>
<p>Using legal separation to justify splitting the ways is also a poor standard. At most traffic light intersections, you can’t change lanes past a certain point. The method you’re describing would demand each lane to be drawn as a separate highway.</p>
<p>Dian</p>
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<p id="reply-intro">On 2022-03-05 07:44, cleary wrote:</p>
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<div class="pre" style="margin: 0; padding: 0; font-family: monospace"><br />Paint is physical. It can be seen. It is not just a psychological or imaginary concept. If one is driving a motor vehicle and abiding by the law then, in my understanding, an unbroken painted line on the road is a physical barrier that cannot be traversed.<br /><br /><br />On Fri, 4 Mar 2022, at 10:55 PM, <a href="mailto:iansteer@iinet.net.au">iansteer@iinet.net.au</a> wrote:
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">This query was triggered by the following comment in another thread, <br />but I’ll start a new thread so as not to distract the original.<br /><br />“ ’Don't split ways if there is no physical separation’ is one of the <br />core tenets of highway mapping in OSM.”<br /><br />My query is about how to correctly map an intersection in Perth while <br />abiding by the above. I will try to describe the situation as best I <br />can without being able to resort to a sketch:<br /><br />- there is a junction between 2 major highways in Perth (Roe & Tonkin <br />Highways)<br />- there is a slip road off one (Roe heading west) that merges with the <br />2 lanes of the other (Tonkin heading south)<br />- from the merge point there are 3 lanes (the slip lane + the 2 through <br />lanes)<br />- from the merge point, there is no physical barrier down to the <br />traffic lights at the next intersection (Hale Rd - which is quite close <br />– hundreds of metres)<br />- however there is a solid white line between the slip lane and the 2 <br />continuing lanes – right to the next intersection<br />- this means you cannot legally come off the slip lane and turn right <br />at the next intersection (Hale Rd) because you cannot legally cross the <br />solid white line<br /><br />This has currently been mapped “as normal”, ie 1 slip lane joining a 2 <br />lane road, becoming 3 lanes after the merge point.<br /><br />Other than maintaining the slip road as a separate way right to the <br />next intersection (with a no right turn), how else would this be mapped <br />so people coming off the slip road cannot turn right at the next <br />intersection?<br /><br />Ian<br />_______________________________________________<br />Talk-au mailing list<br /><a href="mailto:Talk-au@openstreetmap.org">Talk-au@openstreetmap.org</a><br /><a href="https://lists.openstreetmap.org/listinfo/talk-au" target="_blank" rel="noopener noreferrer">https://lists.openstreetmap.org/listinfo/talk-au</a></blockquote>
<br />_______________________________________________<br />Talk-au mailing list<br /><a href="mailto:Talk-au@openstreetmap.org">Talk-au@openstreetmap.org</a><br /><a href="https://lists.openstreetmap.org/listinfo/talk-au" target="_blank" rel="noopener noreferrer">https://lists.openstreetmap.org/listinfo/talk-au</a></div>
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