OK, I agree. However, please help me starting the discussion by stating what issues are to be asked to the community. The use of JOSM instead of the iD editor seems hard to enforce because iD is the official editor, for better and for worse, and it is way easier to use for this kind of work (we can easily change the offset on the fly, and use custom aerial imagery urls and switch between them, which does not always work in JOSM (believe me, a lot of imagery are not loaded correctly in JOSM). I think the main issue here is keeping the history of the ways. However, I do not see how we can fix that or discuss this with the community. Adding a placement=transition to the merging segments will always create a new segment and will delete the existing segment since we need to cut before and after the merging, as well as at each change of number of lanes. I'll let you start the discussion as I am not sure how to introduce the problem exactly. Also, I would like Pierzen to discuss the issue in a videoconference with me because most of the issues would be solved/explained in a matter of minutes when I show the work we do and the reasons why we do it. I willl explain the relation we have with the ministry of transportation, the ministry of natural resources (they manage the aerial photos) and with the transit agencies in Quebec. After that private discussion, we can then create a common introduction for the public discussion. I would like to emphasis here that I did not get any issue from the community regarding this issue in the past except from PierZen (which by the way is a great contributor of OSM in the region), so I am a bit stunned by this... I'm trying to be as efficient and productive as possible. Thanks!