When I have been using OSM for navigation on OSMAnd I have noticed that when approaching some roundabouts (usually mini-roudabouts) the instructions tell me to leave at the wrong exit, It perhaps says ‘third exit’ when I should be leaving at the ‘first exit’. Where this occurs it seems to be caused by a missing directionTag. The default must be anticlockwise in OSM, where in the UK it is clockwise.
The points seems to be that mini-roundadbouts need that directionTag.
My reading is that in countries where regular roundabouts have clockwise traffic that needs to be stated there on mini roundabout nodes… direction=clockwise.
The direction of a roundabout or a mini-roundabout is set by the side of the road driven on in that country. A router must be aware of which side of the road is being driven on without the need for explicit tags. The direction tag is useful to override the default.
Note that the default value for roundabouts and mini-roundabouts is anti-clockwise in most countries (or territories) driving on the right side of bidirectional highways, and clockwise in other countries (or territories) driving on the left side (e.g. United Kingdom or Hong Kong SAR).
Roundabouts and mini-roundabouts are themselves not bidirectional so their direction is almost always implicit…cases where the effective direction is reversed (needing this tag explicitly) are extremely rare Key:direction - OpenStreetMap Wiki
OsmAnd seems to think the issue is fixed but it is clearly not the case. On OSM itself there does not seem to be any consistency in tagging the direction. When it is tagged the navigation works correctly.
Not the first time inter-wiki discussions conflict, and not the first time Osmose conflicts as well on certain roundabouts where it keeps insisting a section is the wrong way. In those cases the ‘ignore’ button is useful to not be confronted every time one looks at Osmose.
It’s pretty much a golden rule of OSM that if something disagrees with Osmose (such as a mapper’s common sense), then Osmose is wrong. To be fair to Osmose, it makes clear on its front page that it shouldn’t be used to overrule common sense, and shouldn’t be used as the sole reason to make a change.
If anyone finds anyone using only Osmose as the source of their changes to OSM please (a) try to reason with them and (b) let the DWG know if (a) fails.
You might want to compose a template on Osmose as I’ve seen you write this a dozen times in the past 1.5 years I’ve been visiting here, and at times avoiding like the bubonic and yes we very well know of their upfront hand-waving.
