In the case of a traffic sign that says "Do Not Enter," what is the correct action?

When approaching a traffic sign indicating "Do Not Enter," the proper response is to immediately turn around or find an alternate route. This sign is a clear directive meant to prevent drivers from entering a street or area where their presence could create hazardous situations, such as one-way streets or restricted zones.

Ignoring this sign can result in serious safety hazards, including potential collisions with oncoming traffic or entering high-risk areas. Proceeding cautiously, as mentioned in another choice, does not align with the fundamental purpose of the sign, which is to prohibit entry altogether. Additionally, simply stopping when necessary may not address the significant risk involved in entering a prohibited area, as the sign is designed to convey a strict instruction rather than allowing for interpretation or conditional compliance.

In essence, recognizing the intent behind the "Do Not Enter" sign reinforces safe driving practices and ensures that drivers navigate roadways responsibly.