Final answer:
The hand signal where a driver extends their hand upward indicates a right turn. It is important for road safety and to communicate driving intentions clearly, especially when a vehicle's turn signals are not functioning.
Step-by-step explanation:
The meaning of a hand signal when a driver's hand and arm are upward is a right turn. This is a standardized signal that motorists may use to indicate their intent to make a right turn, especially when vehicle turn signals are not working or to ensure better visibility to other drivers during daylight hours.
Driver hand signals are an essential part of road safety and understanding them can prevent accidents and improve communication between road users. Always remember that different countries might have variations in hand signals, so it's important to familiarize yourself with the road rules and hand signals of the country you are driving in.
When a driver extends the arm out of the window, bends the elbow so the arm is pointed upwards, and keeps the palm facing forward, it indicates the intention to make a right turn. It's crucial for both the driver and surrounding traffic to acknowledge these signals to maintain safety on the road.