<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br></div><div><br><div><br><br>Javbw</div>On Jun 2, 2016, at 7:59 AM, Duane Gearhart <<a href="mailto:duane@mapzen.com">duane@mapzen.com</a>> wrote:<br><br></div><blockquote type="cite">Can you give an example route using <a href="http://osm.org">osm.org</a> of where there is an issue?</blockquote><br><div>I will re-read the tagging pages to make sure I am not confused, but if a "motorway_junction" = exit, and there is no implicit tag for entrances, this works fine in most places because there is usually a entrance-exit pair for each direction of travel. </div><div><br></div><div>I assume because the ways are connected with a shared node that routing software can tell where to turn and where to go, but since the junction is used as a rendered label of the intersection, that visually might be confusing if there is an exit/entrance only in one direction on the motorway or if there is an entrance only. </div><div><br></div><div>In the freeway system of America, the entrances and exits will be 4 separate motorway_links that separately leave a normal road to join the motorway, but that is not expected in Japan - a single entrance-exit intersection for all directions of travel is common - so having a separated entrance or a junction with an exit for only one direction of travel is rendered confusingly. I have also come across junctions with named sections (gate 1&2) handling their own entrance and exit _links under the guise of being a single "junction". </div><div><br></div><div>Common Japanese Junction.</div><div><a href="https://www.openstreetmap.org/#map=16/36.2414/138.8943">https://www.openstreetmap.org/#map=16/36.2414/138.8943</a></div><div><br></div><div>Common US underpass Junction </div><div><a href="https://www.openstreetmap.org/#map=17/32.93673/-117.11117">https://www.openstreetmap.org/#map=17/32.93673/-117.11117</a></div><div><br></div><div>Orphaned US entrance. </div><div><a href="https://www.openstreetmap.org/#map=19/32.72472/-117.15108">https://www.openstreetmap.org/#map=19/32.72472/-117.15108</a> </div><div>(This is for 163 north, entrance on the other side is for 5 south or 94 west) </div><div><br></div><div>Separated Japanese Junction (etc only, causes wrong way drivers because of separation) </div><div><a href="https://www.openstreetmap.org/#map=15/36.3073/139.0912">https://www.openstreetmap.org/#map=15/36.3073/139.0912</a></div><div><br></div><div>Japanese Exit only southbound (C22). Entrance only northbound. (Orphaned exit & orphaned entrance)This was the junction that had me question why the entrance _link had a junction tag on it. </div><div><br></div><div>The tollway is in a tunnel under the primary road. </div><div><br></div><div><a href="https://www.openstreetmap.org/#map=16/35.6639/139.6882">https://www.openstreetmap.org/#map=16/35.6639/139.6882</a></div><div><br></div><div>Weird junction that has 2 "gates" that lead to different major roads to go to two different tourist attractions (Mt Fuji & Hakone Caldera) but all under the same junction name and reference (ref=7) instead of the normal separation of close junctions (ref=7 & ref=7-1) </div><div><br></div><div><a href="https://www.openstreetmap.org/#map=15/35.2952/138.9500">https://www.openstreetmap.org/#map=15/35.2952/138.9500</a></div><div><br></div><div><br></div><div><br></div><div><br></div></body></html>