When must a turn indicator be used according to driving regulations?

The use of a turn indicator is essential for signaling intent to other drivers on the road, ensuring safety and improving communication during driving maneuvers. According to driving regulations, a turn indicator must be used for all turns, as well as when passing or changing lanes. This helps alert other drivers of your actions, reducing the likelihood of accidents by making your intended movements clear.

Using a turn indicator when making a turn allows other road users to anticipate your direction change, which is especially critical in busy traffic conditions, at intersections, or when navigating through complex road systems. Similarly, signaling when passing another vehicle or changing lanes is vital for ensuring that surrounding drivers are aware of your movements, giving them the opportunity to react accordingly.

In contrast, the other options suggest limited situations where a turn indicator might be used. For example, restricting its use solely to changing lanes or only when leaving a parking space does not align with the comprehensive nature of safe driving practices that promote awareness and precaution on the road. Thus, the requirement to use a turn indicator universally enhances road safety and cooperation among drivers.