Does Canada have stop signs?
Similarly one may ask, do you have to stop at all stop signs?
You must come to a complete stop for all stop signs and red traffic lights. Stop at the stop line if it is marked on the pavement (Diagram 2-23). If there is no stop line, stop at the crosswalk, marked or not.
Secondly, are stop signs universal?
The universal stop sign is a red octagon (eight sided), usually with a white border, usually with the work STOP written in the middle of it in the language of the country you are driving in.
CH stands for Chemin (French: Path; Canada Post street designation)