The driver indicates with his arm that he is going to turn left and has the right turn signal on; which signal is valid?

# Explanation When there is a conflict between hand signals and turn signals, **the arm signal has priority and legal validity**. This is because the arm is a clear and deliberate indication of the driver's intention, while a turn signal being on could be an error or a technical fault. Therefore, other drivers must follow what the driver's arm indicates.