What does the term "blind spot" refer to in driving?

The term "blind spot" in driving specifically refers to areas around the vehicle that cannot be seen through side mirrors or the rearview mirror. Every vehicle has blind spots where other vehicles or objects may not be visible to the driver, which poses a significant risk during maneuvers such as changing lanes or merging.

Understanding the existence of blind spots is crucial for safe driving. It emphasizes the importance of physically checking these areas by looking over your shoulder before making any lateral movement. While side mirrors can provide a good field of vision, they do not cover every angle, hence the need for additional visual checks to ensure safety on the road. The other options describe areas that may or may not be visible but do not accurately define the concept of a blind spot.