<div dir="ltr">Daniel,<div>if you look at the motorway_link page in the wiki (<a href="http://wiki.openstreetmap.org/wiki/Motorway_link">http://wiki.openstreetmap.org/wiki/Motorway_link</a>) you'll see that by default it implies oneway=yes. That would explain the behavior you described. </div>
<div><br></div><div>"<span style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.1875px">Most motorway_link roads will be one way, and should be tagged </span><tt dir="ltr" style="font-family:monospace,Courier;font-size:15px;color:rgb(0,0,0);line-height:19.1875px;background-color:rgb(224,224,240);white-space:pre"><a href="http://wiki.openstreetmap.org/wiki/Key:oneway" title="Key:oneway" style="text-decoration:none;color:rgb(11,0,128);background-image:none">oneway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:oneway%3Dyes" title="Tag:oneway=yes" class="" style="text-decoration:none;color:rgb(11,0,128);background-image:none">yes</a></tt><span style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.1875px">. Any unusual motorway link road which is two-way should be explicitly tagged </span><tt dir="ltr" style="font-family:monospace,Courier;font-size:15px;color:rgb(0,0,0);line-height:19.1875px;background-color:rgb(224,224,240);white-space:pre"><a href="http://wiki.openstreetmap.org/wiki/Key:oneway" title="Key:oneway" style="text-decoration:none;color:rgb(11,0,128);background-image:none">oneway</a>=<a href="http://wiki.openstreetmap.org/wiki/Tag:oneway%3Dno" title="Tag:oneway=no" class="" style="text-decoration:none;color:rgb(11,0,128);background-image:none">no</a></tt><span style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.1875px">. Note that this is different to the way we treat other highway classifications, because motorway link roads are so often one way. Explicit tagging (either way) can be important, since </span><i style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.1875px">some</i><span style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.1875px"> tools interpret motorway link roads as implicitly oneway=yes unless tagged oneway=no."</span></div>
<div><span style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.1875px"><br></span></div><div><font color="#000000" face="sans-serif"><span style="line-height:19.1875px">I wonder if there would be a way to filter all those links that are reversed with the Overpass API?</span></font></div>
<div><font color="#000000" face="sans-serif"><span style="line-height:19.1875px"><br></span></font></div><div><font color="#000000" face="sans-serif"><span style="line-height:19.1875px"> Harald.</span></font></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Mon, Nov 25, 2013 at 2:40 PM, Daniel Begin <span dir="ltr"><<a href="mailto:jfd553@hotmail.com" target="_blank">jfd553@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-CA" link="blue" vlink="purple"><div><p class="MsoNormal">Bonjour, <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I’ve just found out that I have routing troubles with OSM data in a Garmin GPS when motorway_link are not tagged oneway=yes/no. Here is an example where some segments of motorway_link can be driven both ways (2 lanes, one each side)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><a href="http://www.openstreetmap.org/#map=16/46.0194/-72.3512" target="_blank">http://www.openstreetmap.org/#map=16/46.0194/-72.3512</a><u></u><u></u></p><p class="MsoNormal">
<u></u> <u></u></p><p class="MsoNormal">Everything works fine when tags are…<u></u><u></u></p><p class="MsoNormal">highway=motorway_link<u></u><u></u></p><p class="MsoNormal">oneway=no, or <u></u><u></u></p><p class="MsoNormal">
oneway=yes<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">But it doesn’t work if there is no oneway tag. Actually, the way must have been digitized in the direction I want ot go – as if it assumes that no oneway tag means oneway=yes. In the provided example, my GPS will find a way out of the motorway but it will not find a way in! - must be looked at in an editor.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">It could have been my usual OSM/Garmin provider ( <a href="http://www.osmmaps.com/maps/canada" target="_blank">http://www.osmmaps.com/maps/canada</a> ) but when I saw the same behavior in JOSM I wonder if there is a rule I’m not aware of? Should I change my OSM/Garmin provider or tell him there is a problem with his conversion program?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Comments or answers?<span class="HOEnZb"><font color="#888888"><u></u><u></u></font></span></p><span class="HOEnZb"><font color="#888888"><p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Daniel<span lang="FR-CA"><u></u><u></u></span></p></font></span></div></div><br>_______________________________________________<br>
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