How far behind the vehicle should the left and right flat mirrors be adjusted to see?

The left and right flat mirrors should be adjusted to provide a clear view of the areas behind and alongside the bus, effectively allowing the driver to spot vehicles and obstacles. A distance of 200 feet behind the vehicle is recommended for these mirrors, as this adjustment enables the driver to assess traffic conditions and any potential hazards that may be present when the bus is in motion. This distance ensures a wide field of vision and minimizes blind spots, which is crucial for safe driving in an environment where large vehicles face unique challenges. Maintaining this visibility is essential for making informed decisions while driving, thereby enhancing safety for both the bus passengers and other road users.