What do stop signs indicate primarily?

Stop signs primarily indicate specific actions that drivers must take when approaching an intersection. The primary purpose of a stop sign is to require drivers to come to a complete halt at the designated sign, allowing them to assess the intersection for oncoming traffic or other hazards before proceeding. This action helps in promoting safety by ensuring that drivers are aware of their surroundings and allows right-of-way for other vehicles or pedestrians who may be crossing.

In contrast, the other options focus on different concepts: directions to follow relate more to navigational instructions, the speed limit pertains to how fast a motorist can legally drive, and road conditions deal with the current state of the roadway itself, which could include weather-related factors or construction. While these elements are important for driving safety and compliance with traffic regulations, they do not capture the primary function of a stop sign.