When completing a turn, when should a driver signal their intention?

Answer: B — At least 100 feet before the turn

A driver should signal their intention to turn at least 100 feet before making the turn to ensure that other road users are aware of the upcoming maneuver. This practice enhances safety by providing ample time for other drivers, cyclists, and pedestrians to react accordingly. Signaling in advance helps prevent confusion and allows for a smoother flow of traffic. By maintaining this distance for signaling, drivers become more predictable, which is crucial in preventing accidents. It is a fundamental aspect of defensive driving and is part of the rules of the road that promote the safety of everyone sharing the roadway. Waiting until the vehicle begins to turn or only signaling when others are present would not provide enough advance notice and could lead to misunderstandings or accidents. Therefore, signaling at least 100 feet before the turn is not only a good practice but also a legal requirement in many jurisdictions, including Illinois.