In general, state law defines a school bus as a motor vehicle carrying 10 or more passengers in addition to the operator for the purpose of transporting pupils to or from school, curricular or extracurricular activities, or religious instruction on a day school is in session, or for the purpose of transporting children with disabilities to or from an approved educational program. State statutes impose certain requirements and restrictions on school bus equipment and operators. They also establish traffic safety standards to safeguard school buses and their passengers. In addition, the Department of Transportation (DOT) may issue rules on the design, construction, inspection, and operation of a school bus. This issue brief describes certain of those statutes and rules.