What does a "wrong way" sign warn drivers about?

A "wrong way" sign is specifically designed to alert drivers that they are entering a one-way street or a highway in the wrong direction. This sign is crucial for preventing accidents, as it indicates that a driver may be heading towards oncoming traffic, which poses a significant risk of a collision. When the sign is encountered, it serves as an immediate warning to stop and reassess the route, ensuring the driver understands they need to turn around before entering a dangerous situation. The primary purpose of this sign is to maintain safety on the roads by guiding drivers to navigate correctly.