Final answer:
The stop sign requires drivers to come to a complete stop and not proceed until it's safe, with the intent of preventing accidents and enhancing safety.
Step-by-step explanation:
The stop sign is a traffic control device that requires drivers to come to a full stop at an intersection. This means that they must cease all forward motion and cannot proceed until it is safe to do so. The stop sign is designed to prevent accidents by ensuring that drivers do not speed through the intersection without regard to safety or the posted speed limit. Installing traffic signals can help to regulate vehicle and pedestrian movement, enhancing safety and reducing the number of accidents, which, as noted, in some cases have been tragically fatal. Therefore, the correct answer to the meaning of a stop sign is option 2) Come to a full stop.