Bus operators will often find it economical to convert retired buses to use as permanent training buses for driver training, rather than taking a regular service bus out of use. Some large operators also converted retired buses into tow bus vehicles, to act as tow trucks.
Explain to an 8 year old child that is not yet 49 tall that the safety equipment built into the vehicle is for adults  not children, and a child needs to continue to use the proper equipment (booster seat) so that the adult equipment will fit, and be able to protect, their bodies in the event of a crash.
The answer depends on where you live. According to the U.S. Governorâs Highway Safety Association, kids in Florida and Alaska can stop using booster seats by the age of four. In other states, like California, kids must stay in booster seats until they are eight.