If the turn indicators are not functioning, what must be used instead?

The correct answer indicates that if the turn indicators are not functioning, the driver must use hand signals to indicate their intentions to other road users. Hand signals are essential for communicating with other drivers and pedestrians, particularly when turning or changing lanes. This method is a traditional backup that ensures safety on the road when standard signaling devices are compromised.

Using hand signals involves extending the arm out of the driver's window at various angles to convey specific actions: an arm extended horizontally for a left turn, an arm bent at a 90-degree angle upward for a right turn, and an arm bent at a 90-degree angle downward for stopping. This practice enhances visibility and understanding among road users, reducing the likelihood of accidents.

Understanding the necessity of alternative signaling methods when electronic systems fail is critical to maintaining safety on the road and is a key aspect of responsible driving.