Which of these statements is true about changing lanes?

Before changing lanes, signal, look in all your mirrors, and look over your left or right shoulder to make sure the lane next to you is clear. Looking over your shoulder is a way to check your blind spot to be sure there is no vehicle, motorcycle, or bicycle traffic in the next lane.

• You only need to turn and look over your right shoulder for lane changes to the right or left.
• Look over your right shoulder for a right lane change and your left shoulder for a left lane change.
• Vehicles with two outside mirrors do not have blind spots.