Answers to: Priority road crossing, how to correctly map these?<p>Just ran into a dangerous navigation comment due to this. <a href=";lon=-4.65104&amp;zoom=16">See the situation outside Alhaurín el Grande</a> or graphically:</p> <pre><code> ++++++++++ ----------------- + + +++++++++++++++++ </code></pre> <p>I'm traveling from left to right, the ++ refer to the main (priority) road A-404, the -- to an old route. I needed to go onto the old road, which means leaving the main road and giving way to any traffic on it coming my way. The comment however was: GO STRAIGHT ON, while IMO it should have been 'Take a left turn' or similar.</p> <p>I have just now, added 'priority_road=yes_unposted' to the A-404, after finding this possibility, I however do not know if this will solve the potentially dangerous situation, by giving correct comments on the route to follow.</p> <p>If it does, it would be a lot easier (and thus used a lot more then the, supposedly, only 2000 uses in all OSM) if this option were available in one of the drop-down menus.</p> <p>If it does not, how should it be mapped correctly?</p> <p>Additional, but related question, how do I map correctly the way back at the same crossing, where I have to GIVE WAY to the priority road? Can I add a 'Give way' sign to the intersection? If so, how?</p>enThu, 04 Jun 2020 16:45:37 +0100Answer by vmicho<p>I don't know how it is in your country, but in most European countries, the situation as drawn in the OP's post is really that by going "straight" (from left) you leave the main road, no signaling necessary. To stay on main road, you have to turn right and signal. Making turns and giving way are 2 different independent actions in a crossroad.</p> <p>Unless the main road is really marked as being just a large curve (that you are basically following it). In this case it is better to adjust the main road to be in a nice arc, and make the side road join it under a sharper angle so for the navigation it really looks like turning. I did adjust few crossing like this after navigation (Osmand) told me to sharply turn left, where it actually was more like 90 degree turn.</p>vmichoThu, 04 Jun 2020 16:45:37 +0100 by Hendrikklaas<p>Hi, wich traffic sings are there to show the travellers who gets the right of way ? That should give the solutions for this problem. And tag the roads accordingly.</p>HendrikklaasFri, 03 Aug 2012 17:41:45 +0100 by Frederik Ramm<p>There are many different routing engines/satnavs using OSM data.</p> <p>All of them differ in how they interpret OSM data.</p> <p>Some might understand your tag <code>priority_road=yes_unposted</code> however I doubt that any will. (Note that you mistakenly used a minus sign instead of an underscore in your question). </p> <p>There is most likely not one true way to map this in OSM to make sure that all routing engines/satnavs do the right thing. If you are interested in one specific routing engine/satnav, you have to (a) tell us which and (b) likely talk to its authors to find out.</p> <p>Your idea that the situation you describe should be called "making a left turn" seems a bit outlandish to me. It is not a left turn. The instruction "straight on" will typically even be given if you have to stop at a traffic light, or if you have to cross a road that has priority - "straight on" does not usually mean that you have priority.</p>Frederik RammFri, 03 Aug 2012 17:31:05 +0100