How far in advance must you activate your turn signal before making a turn?

The correct response is based on the widely adopted guideline that requires a driver to activate their turn signal at least 100 feet before making a turn. This distance is intended to provide adequate warning to other drivers and pedestrians of your intention to turn, allowing them enough time to react appropriately. Signaling well in advance enhances safety by reducing the risk of collisions caused by late or unexpected turns.

While the other choices indicate shorter distances, activating the turn signal at these shorter intervals may not provide sufficient time for other road users to notice your intent, potentially leading to confusion or accidents. Therefore, understanding the importance of signaling 100 feet in advance is crucial for safe driving practices, especially in bus operations where the safety of passengers is paramount.