<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">Here is the osm location</div><div dir="ltr"><br></div><div dir="ltr"><a href="https://www.openstreetmap.org/#map=15/-31.9881/115.9857">https://www.openstreetmap.org/#map=15/-31.9881/115.9857</a></div><div dir="ltr"><br><blockquote type="cite">On 4 Mar 2022, at 9:59 pm, iansteer@iinet.net.au wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal">This query was triggered by the following comment in another thread, but I’ll start a new thread so as not to distract the original.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">“ ’Don't split ways if there is no physical separation’ is one of the core tenets of highway mapping in OSM.”<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">My query is about how to correctly map an intersection in Perth while abiding by the above. I will try to describe the situation as best I can without being able to resort to a sketch:<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">- there is a junction between 2 major highways in Perth (Roe & Tonkin Highways)<o:p></o:p></p><p class="MsoNormal">- there is a slip road off one (Roe heading west) that merges with the 2 lanes of the other (Tonkin heading south)<o:p></o:p></p><p class="MsoNormal">- from the merge point there are 3 lanes (the slip lane + the 2 through lanes)<o:p></o:p></p><p class="MsoNormal">- from the merge point, there is no physical barrier down to the traffic lights at the next intersection (Hale Rd - which is quite close – hundreds of metres)<o:p></o:p></p><p class="MsoNormal">- however there is a solid white line between the slip lane and the 2 continuing lanes – right to the next intersection<o:p></o:p></p><p class="MsoNormal">- this means you cannot legally come off the slip lane and turn right at the next intersection (Hale Rd) because you cannot legally cross the solid white line<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">This has currently been mapped “as normal”, ie 1 slip lane joining a 2 lane road, becoming 3 lanes after the merge point.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Other than maintaining the slip road as a separate way right to the next intersection (with a no right turn), how else would this be mapped so people coming off the slip road cannot turn right at the next intersection?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Ian<o:p></o:p></p></div><span>_______________________________________________</span><br><span>Talk-au mailing list</span><br><span>Talk-au@openstreetmap.org</span><br><span>https://lists.openstreetmap.org/listinfo/talk-au</span><br></div></blockquote></body></html>