What is the function of adjusting mirrors in a commercial vehicle?

The function of adjusting mirrors in a commercial vehicle is primarily to maximize visibility. Properly adjusted mirrors enable the driver to have a clear and comprehensive view of the surrounding areas, including blind spots, which is crucial for safe driving. In larger vehicles, such as trucks and buses, the driver's view can be obstructed due to their size and the position of the seating, making it even more important to ensure that mirrors are aligned correctly.

Maximizing visibility helps the driver be aware of nearby vehicles, pedestrians, and other potential hazards on the road. This contributes significantly to the overall safety of the vehicle operation, as it allows for informed decision-making while driving, such as changing lanes or merging into traffic.

The other options, while they may pertain to issues drivers encounter, do not directly relate to the primary purpose of mirror adjustment. Enhancing interior lighting, improving audio signals, and reducing windshield glare address different aspects of vehicle functionality and comfort rather than the key operational objective of ensuring a clear visual field for the driver.