If you see a car approaching from the rear in your mirror and you later do not see it, what should you do before changing lanes?

• A. Wait until you are sure the car isn't in your blind spot
• B. Change lanes quickly
• C. Signal and move into the other lane
• D. Brake to let the car pass

Answer: (A)

Before changing lanes, always confirm the lane you’re moving into is truly clear in all your blind spots. If a car you saw in your rear mirror later isn’t visible, it could have moved into your blind spot. Mirrors alone don’t reveal everything, so perform a quick head check by glancing over your shoulder toward the lane you intend to enter. Only when you’re certain that area is free should you signal and complete the lane change.