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<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">In France, a solid line means do not cross. It is more than do not overtake. On French motorways, the line between the main carriageway and the hard shoulder is broken for this reason.</span></p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'NokiaPureTextLight';"><br></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">In this case it does mean no U-turns, and a left turn restriction will fix the problem.</span></p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'NokiaPureTextLight';"><br></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">The router does need fixing however as U-turns around a roundabout divider island are rarely sensible and should not be treated as a junction.</span></p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'NokiaPureTextLight';"><br></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">Phil<br><br>--<br></span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">Sent from my Nokia N9<br></span></p></div><br><div id="fenix-reply-header"><p>On 03/07/2012 12:29 Janko Mihelić wrote:<br></p></div><div id="fenix-quoted-body">I think "no_left_turn" is the best solution. The line on the middle of the street is not a u-turn indicator, it is an overtake indicator which can be tagged with overtaking=no and overtaking=both.<br><br>Are you sure that the dotted overtake line allows you to make a u-turn?<br>
<br>Janko<br><br><div class="gmail_quote">2012/7/3 Pieren <span dir="ltr"><<a href="mailto:pieren3@gmail.com" target="_blank">pieren3@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi all,<br>
<br>
Someone on the help site is questioning about a missing u-turn<br>
restriction on a roundabout junction with splitter islands ([1] in<br>
French). The problem is when you take one roundabout exit and want to<br>
come back to the roundabout, a router like OSRM is telling you to<br>
immediatly turn left after the divider although it is not allowed on<br>
the ground.<br>
He is pointing one example on OSRM :<br>
<a href="http://map.project-osrm.org/?hl=fr&loc=47.291040,-2.356550&loc=47.291970,-2.356720&z=18¢er=47.291347,-2.357208&df=0" target="_blank">http://map.project-osrm.org/?hl=fr&loc=47.291040,-2.356550&loc=47.291970,-2.356720&z=18¢er=47.291347,-2.357208&df=0</a><br>
<br>
With the aearial imagery (can be enabled on OSRM), we can see that the<br>
u-turn is forbiden on about 10..15 meters after the splitter island<br>
with a painted continuous line on the ground. I don't think a<br>
no-turn-left-restriction relation is the best solution here since we<br>
just indicate the restriction at the splitter island node but we don't<br>
say at which point it will be possible to u-turn. I think the best<br>
solution is to represent the continuous painted line on the 15 meters<br>
road segment. The best tag I've found so far is the "divider" proposal<br>
on the wiki ([2]) but is not very popular ([3]). Any thought ?<br>
<br>
Pieren<br>
<br>
[1] <a href="http://help.openstreetmap.org/questions/13939/interdiction-de-tourner-sur-entreesortie-de-rond-point" target="_blank">http://help.openstreetmap.org/questions/13939/interdiction-de-tourner-sur-entreesortie-de-rond-point</a><br>
[2] <a href="http://wiki.openstreetmap.org/wiki/Proposed_features/Divided_road" target="_blank">http://wiki.openstreetmap.org/wiki/Proposed_features/Divided_road</a><br>
[3] <a href="http://taginfo.openstreetmap.org/keys/divider" target="_blank">http://taginfo.openstreetmap.org/keys/divider</a><br>
<br>
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</blockquote></div><br>
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