I have taken a school bus at 6am (on a Saturday, no less) to a regional school event the next state over that started at 9am. My old high school had a "Zero Ho

I have taken a school bus at 6am (on a Saturday, no less) to a regional school event the next state over that started at 9am. My old high school had a "Zero Hour" during weekdays that started at 7:05am for those who had to work after school to support their families, or other obligations like sports in the afternoon. Busses serviced these kids. Combine that with the fact that children are high risk to cross the street without looking both ways for oncoming traffic, and school busses (and only school busses) are traditionally painted yellow as an alarm to the community to be very careful around them as there is a good chance it is hauling children and exceptional caution is to be given.