What does a hand signal with the hand down indicate?

A hand signal with the hand down indicates a stop. This specific gesture is universally recognized among drivers and provides a clear indication of the driver's intention to halt their vehicle. It's important for drivers to be aware of hand signals, especially when visibility is poor or when signaling devices are malfunctioning. By using this signal, a driver can effectively communicate with others on the road, helping to maintain safety and prevent accidents.

The other options represent different actions: a hand signal raised upward typically indicates a right turn, while a left arm extended horizontally signifies a left turn. The signal for proceeding with caution does not have a standardized hand gesture and typically relies on context, such as flashing lights or a driver's erratic behavior. Understanding these hand signals enhances overall awareness and promotes safe driving practices.