Why is a yellow school bus yellow in color?

A yellow school bus is yellow primarily for safety and visibility. The bright color is easily recognizable and stands out in various weather conditions, making it easier for drivers and pedestrians to see. The specific shade of yellow used is known as "school bus yellow," which was chosen for its high visibility, helping to ensure the safety of children as they board and exit the bus. This color standard has been in place since the 1930s to promote uniformity and safety in school transportation.