What is the purpose of opening the driver's window when a type 2 bus is stopped at a railroad crossing?

Opening the driver's window when a type 2 bus is stopped at a railroad crossing serves the crucial purpose of allowing the driver to listen for oncoming trains. This action enhances the driver's awareness of the environment, particularly the sounds of an approaching train that may not be visible due to various obstacles. Since trains can approach at high speeds and are quieter than many might expect, relying on auditory cues is essential for safety when determining whether it is safe to cross the tracks. This practice is a vital safety precaution, as it helps prevent potential accidents by ensuring that the driver has all available information before proceeding across the railroad tracks.