What is the primary purpose of turn signals?

Turn signals are an essential component of safe driving as their primary purpose is to notify other drivers of your intention to turn or change lanes. By using turn signals, you communicate your movements to surrounding vehicles, which helps prevent accidents and allows for smoother traffic flow. It is vital for drivers to signal their intentions well in advance, providing ample time for others to react appropriately.

The other options address different aspects of vehicle operation and safety that do not relate to the fundamental function of turn signals. For instance, while making your car more visible is important, it does not specifically pertain to signaling intention. Indicating speed is essential for maintaining control and obeying traffic laws but is not a role of turn signals. Warnings of emergency stops are crucial but are handled differently, such as by using hazard lights or brake lights, rather than turn signals.