What is the purpose of "blind spot" mirrors on a commercial vehicle?

The purpose of "blind spot" mirrors on a commercial vehicle is to reduce blind spots and improve visibility of surrounding vehicles. These specialized mirrors are designed to extend the driver's field of vision, allowing them to see areas that are not captured by standard side mirrors. In a commercial vehicle, which is generally larger and has more significant blind spots compared to regular passenger vehicles, the ability to monitor surrounding traffic is crucial for safe maneuvering. This added visibility is vital when changing lanes, making turns, and being aware of nearby vehicles, thereby enhancing overall road safety and preventing potential accidents.

The other options do not accurately reflect the primary function of blind spot mirrors. They are not intended for advertisement space, do not serve an aesthetic purpose, and do not directly indicate safe lane changes, although improved visibility can help facilitate safer lane changes when used effectively.