Hi there, thank you for your comment.
The geographical size is due to me using an overpass request for crossings in France and France has territories all over the world, I should have limited my request to a smaller zone, indeed.
I made modifications around the crossings partly due to corrections on errors identified by JOSM, and partly to my obsession on adding some specific features (parkings, giveways, and cycling equipments).
I'll be more careful and thank you for the reminder :)