Vehicles are of many colours worldwide, but school buses have a single yellow colour.

You might know about colours, wavelength, and frequency.

Red colour contains better wavelength in comparison with other dark colours.

The colour red is often used, in crucial places, like the sign stopping, warning posts etc.

Likewise, there is a scientific reason behind using Yellow colour for school buses.

Have you ever heard about VIBGYOR and rainbow colours? Well, every other colour is made of these seven colours.

Yellow has the second most wavelength among these seven colours.

Red depicts danger, which is why yellow colour is used for school buses.

Indian supreme courts have passed laws to paint school buses Yellow.

Yellow colour can be seen in low visibility like rain, fog etc.