What is the primary purpose of using turn signals?

The primary purpose of using turn signals encompasses multiple important aspects, which is why the most comprehensive answer is that they serve all these functions. Turn signals are essential for communicating with other road users; this includes alerting them of your intentions when you plan to change lanes, make turns, or maneuver in any manner that affects the flow of traffic. By signaling, drivers can minimize confusion and help to prevent accidents, as other drivers will be aware of what to expect from your vehicle's movements.

Additionally, using turn signals is a requirement in most jurisdictions, including Illinois, making it also a matter of legal compliance. Beyond the legal requirement, the safety aspect highlighted by turn signals reinforces their necessity—they contribute significantly to the predictability of traffic flow.

The reasons for signaling, including indicating lane changes and alerting other drivers, collectively form the basis of safe driving practices, which is vital for both individual safety and the safety of all road users. Thus, understanding the comprehensive nature of why turn signals are used reinforces the importance of this practice as a fundamental part of conscientious driving.