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What should you do if you see a Do Not Enter sign?

  1. Proceed with caution.

  2. Stop and look for oncoming traffic.

  3. Turn around and find an alternate route.

  4. Ignore it if it's unclear.

The correct answer is: Turn around and find an alternate route.

Seeing a Do Not Enter sign indicates that you are approaching a one-way street or an area where entry is prohibited. This sign is critical for maintaining traffic flow and enhancing safety by preventing drivers from entering roads where they could be heading into oncoming traffic, which can lead to serious accidents. Choosing to turn around and find an alternate route is the proper response because it ensures that you obey traffic regulations, thereby protecting yourself and other road users. It is essential to adhere to these signs for the safety and efficiency of roadway navigation. In contrast, proceeding with caution or stopping to look for oncoming traffic does not address the primary directive of the sign, which is to not enter at all. Ignoring the sign or considering it unclear is also inappropriate, as drivers are legally obligated to follow all traffic signs to avoid potential hazards or legal repercussions.