One wouldn't think that stopping at a stop sign would be such a problem for drivers. It seems relatively simple, come to a complete stop, look both ways and then go if it is safe to do so. Most drivers seem to understand this but have difficulty with where to stop.
The simplest case is one where there is nothing at the intersection other than the stop sign. Here one must stop before entering the intersection itself and in a position nearest to the crossroad where a driver has a clear view of traffic approaching on that crossroad.
Where there is a marked crosswalk along with the stop sign a driver must stop before entering the crosswalk. Doing so will protect against a collision if the driver has failed to notice any pedestrians present.
The stop sign with a marked stop line seems to be the most difficult. Stop lines never seem to be placed at a point where the driver has a good view to the left and right if they stop as required. Consequently, stop lines are often ignored completely. The proper thing to do here is to stop at the line, move ahead to a point where you can see properly, stop again and then proceed after looking both ways to insure it is safe to do so.
Keeping in mind that more than half of all collisions in British Columbia happen at intersections, following proper stop sign etiquette places you in control in a high hazard area.