Before making a turn, what is a crucial step?

Signaling at least 100 feet before making a turn is crucial because it informs other drivers and pedestrians of your intentions well in advance, allowing them to react appropriately. This practice enhances safety on the road by reducing the likelihood of confusion or collision with other vehicles. It also helps to maintain the flow of traffic, as other road users can anticipate your movements. Proper signaling is a fundamental aspect of safe driving behavior and is essential for effective communication on the road.

The other options do not prioritize safety in the same way. Checking mirrors after signaling may not give enough time or visibility for other drivers to notice your intent to turn. Speeding up to clear a turn can be dangerous and might lead to losing control of the vehicle, while turning on hazard lights is not appropriate for signaling a turn and can confuse other drivers about your actions.