The first school bus was used in North America in the 19th century. Since there were no motor vehicles at that time, horse carriages were used to ferry and carry students who were staying away from school. In the early 20th century, however, motor vehicles were replaced by horse carriages as school vehicles, which were wood and metal, and were painted orange or yellow to distinguish them from other motor vehicles.
You will also be surprised to know that the official yellow coloring of school buses began in 1939 in North America, and then in many countries around the world, including India, the United States, and Canada, school buses turned yellow. The yellow color has now become the hallmark of the school bus.
Also inform you that the Supreme Court has issued a number of guidelines on school buses, which say that the color of private school buses should be yellow and that it is mandatory to write 'School Bus' in front and back of the school bus and if the school bus is on board. If the rental is there, it is also necessary to have a 'school bus duty' written on it.