What is the primary value of the overhead rear-view mirror inside a bus?

The overhead rear-view mirror inside a bus primarily serves to monitor passenger activity. It allows the driver to have a broader view of what is happening inside the bus without needing to turn around. This is crucial for ensuring passenger safety, maintaining order, and addressing any issues that may arise while the bus is in motion.

The design of the mirror is such that it helps the driver keep an eye on passengers, which is especially important in situations involving children or when passengers may need assistance. While visibility directly behind the bus and navigation are important factors in driving, the primary function of the overhead mirror specifically focuses on the interior space and the passengers present, making it an essential tool for driver awareness and safety management.