To change lanes you should:

Before changing lanes, you should activate your turn signal in the appropriate direction and check your rearview and side mirrors. Look over your shoulder in the direction you plan to move in order to check your blind spot and check the far lane to be sure no one else is trying to enter the same lane as you. Change lanes when you are sure it is safe to do so.

• Check your mirrors and signal, then change lanes.
• Signal, check your mirrors, check your blind spot in the direction you plan to move, then change lanes.
• Signal, check your mirrors, and change lanes.
• Signal and change lanes.