What is the exact status of Tag:placement=transition since it has not been adopted systematically in other countries ? You are the main user adopting this tag and you cannot refer to discussions with the local community. There is not a general adoption of this tag around the world. Statistics show that this is yet mainly in Québec.  The way you retrace the transition wont be obvious for other contributors. Where is the «mapping place» for these contributors.  You have a high volume of objects erased (history lost) and recreated, often simply to modify geometry. We cannot accept that this is an artefact of iD Editor. If we look at highway objects for example, we can go back 10-15 years of OSM history for these objects in countries like Germany, France, UK, USA.