I'm fine with using "Mon" for Montée. It may not be standard but it is the first three letters so it's easily decipherable. When I drafted islth I used the first thee letters for each type of road suffix in Icelandic, there are as far as I can tell no standard abbreviations for those either.
I support using the standard French abbreviations for others (e.g. "Boul" instead of "Blvd").
Couple route specific notes:
- For QC138Mon, what is with the kink in the route around point BoulAng? It appears to me you may have captured a temporary detour route around construction in the area. To properly catch the permanent route you will want to delete the three points between A-20(64) and RueStJac_W.
- For QC136, my understanding is the western end is at QC 175, not A-73
(it is signed from QC 175). This road was a subject of discussion at the 2014 Quebec City meet, and Carl had pointed out where the technically correct endpoints are. Let me ping him about it.