I zoomed in on the signs, saw it was 12 or 17, looked up to see what it could be. At first I thought it was US route 17/12 (the speed limit and danger signs are north american shape), so I google drove through all of route 12 from aberdeen to mid-montana, since that's where the similarity in landscape and vegetation stops. Since that didn't work (and it took me all of the first day) I looked more carefully, saw it wasn't a symmetrical sign and eventually found NB's route 17. I just drove through it both ways until I found the spot I took in picture.