Which of the following is essential for safe lane changing?

Using turn signals and checking blind spots is essential for safe lane changing because these actions ensure that you communicate your intentions clearly to other drivers and confirm that the lane is safe to enter. Turn signals alert other road users of your intent to change lanes, which allows them to adjust their speed or position accordingly and helps prevent potential collisions.

Checking blind spots is equally crucial as mirrors do not provide a complete view of the road surrounding your vehicle, especially in areas that may not be visible from the side mirrors. By turning your head and looking over your shoulder, you can identify any vehicles that may be in your blind spot, thus reinforcing your safety while changing lanes. This multi-faceted approach to lane changing promotes safety for both the driver and others on the road.