What is the function of a stop sign?

The primary function of a stop sign is to require vehicles to come to a complete stop at the intersection where the sign is placed. This traffic control device is critical for ensuring safety, as it allows drivers to check for oncoming traffic and pedestrians before proceeding. By necessitating a full stop, stop signs help to prevent collisions and ensure that all vehicles and pedestrians can navigate the intersection safely. Understanding this rule is vital for maintaining order on the road and for adhering to traffic laws designed to protect all road users.