Where:
On any road, before an intersection controlled by a stop sign, particularly in areas where the stop sign may not be easily visible due to curves, hills, vegetation, or other visual obstructions.

Purpose:
To warn drivers that a stop sign is ahead and may not be visible until you are close to the intersection.
Advance warning ensures drivers have enough time to slow down safely and stop, preventing collisions at intersections.

Action:
Reduce your speed in advance of the intersection.
Be prepared to come to a complete stop at the stop line or intersection, even if the road appears clear.
Scan the intersection carefully for other vehicles, pedestrians, or cyclists who may be crossing.
Proceed only when it is safe, ensuring you have full visibility of the intersection and that other road users have stopped or yielded as required.
Maintain alertness in poor visibility conditions such as fog, rain, or at night, as the stop sign may be harder to see.