To check the blind spot before changing lanes to the left you should:

• A. Look in the right outside mirror only
• B. Look over your shoulder
• C. Look in both inside and outside mirrors only
• D. Look in the left outside mirror only

Answer: (B)

Checking your blind spot before changing lanes is a crucial step in ensuring safety on the road. Looking over your shoulder is the correct approach because it allows you to see any vehicles or obstacles that are not visible in your mirrors. While mirrors provide a good overview of the surroundings, they do not capture areas that could be obstructed by the car’s frame or other vehicles. By physically turning your head and looking over your shoulder to check the blind spot, you gain a full understanding of the traffic situation before making your lane change.

This technique not only enhances your awareness but also helps prevent potential accidents by ensuring that the lane you are moving into is clear of any approaching vehicles.