Why is it important to check your mirrors frequently while driving?

Checking your mirrors frequently while driving is crucial for maintaining awareness of surrounding traffic. In a commercial driving context, being aware of other vehicles, pedestrians, and potential hazards is essential for safety. By regularly observing the mirrors, a driver can see what is happening behind and to the sides of the vehicle, helping to make informed decisions while changing lanes, merging, or anticipating the actions of other road users. This practice is particularly important for larger vehicles, where blind spots can obscure visibility of smaller cars or motorcycles.

The other options, while they might seem relevant to vehicle operation, do not directly contribute to the critical need for situational awareness that mirror checks provide. Monitoring music or speed and increasing fuel efficiency are not priorities that will significantly impact safety in the same way that being aware of one's surroundings does.