Why do school buses have curved roofs?

aerodynamics.

Strength in a roll over and center height for the isle.

so water doesn't build up on the roof...with the curve it just slides off.

so its alot easier to flip over if it was fliped? and probably aerodynamics cause if it was completely squarish then a big gust from the side could easly make it swerve and could maybe knock it over

i wish MR Rodgers was still alive. maybe he'd take us on a field trip to a bus company?

aerodynamics