The 2-3 years out of date Y! images, as useful as they are, can get thoroughly irritating at times. (admittedly, I wish the city had chosen not to devellop the area to begin with, but you can't get everything, alas.) I was entering route 81, but it turns out it was rerouted since I last used it and now serves a series of recently completed developments near the Saint-Joseph/Chauveau intersections that are completely missing on the satellite imagery.