What does the convex mirror on a school bus help the driver observe?

The convex mirror on a school bus is designed to enhance the driver's awareness of the area surrounding the bus, particularly when it comes to monitoring the entrance door and ensuring the safety of passengers who are boarding or alighting. These mirrors provide a wider field of vision compared to flat mirrors, allowing drivers to see more of the space immediately around the bus that may not be visible through standard rearview mirrors.

When children are getting on or off the bus, it is crucial for the driver to have a clear view to prevent accidents, as children may be in close proximity to the bus. The convex mirror aids in spotting any movement and maintaining a safe environment for the passengers. By ensuring the door and vicinity are clear, the driver can make informed decisions about when it is safe to open the door and allow students to enter or exit.

In contrast, while convex mirrors can provide some visibility for other aspects like traffic or road signs, their primary use on a school bus is directly related to the safety of the passengers as they board and alight.