What is the purpose of using turn signals effectively?

Using turn signals effectively serves primarily to alert other drivers of your intentions. This communication is essential for maintaining safety on the road. When you signal your intention to turn or change lanes, it allows other motorists, cyclists, and pedestrians to anticipate your actions. This reduces the likelihood of misunderstandings that could lead to accidents, as other road users can adjust their speed and position accordingly.

Additionally, effective use of turn signals helps to create a more predictable traffic environment, where everyone is informed about the movements of other vehicles. This is a fundamental principle of safe driving, contributing to overall traffic harmony and safety.

The other options do not encompass the core purpose of turn signals. For instance, while judging the speed of traffic and indicating pedestrian crossings are important aspects of driving, they do not relate directly to signaling intentions. Similarly, signaling the beginning of a journey is not a common practice and does not contribute to the primary function of turn signals on the road.