In Wisconsin, a school bus is a motor vehicle which carries 10 or more passengers in addition to the operator, or a motor vehicle painted with legally required school bus markings, glossy school bus yellow trimmed in black, for the purpose of transporting:
- Pupils to or from a public school or a private school or pupils to or from a technical college when required.
- Pupils to or from curricular or extracurricular activities.
- Pupils to or from religious instruction on days when school is in session.
- Children with disabilities to or from an educational program approved by the department of public instruction.
A school bus can also be a motor vehicle that is painted with legally required school bus markings and is used for the purpose of transporting disabled persons or elderly persons in connection with any transportation assistance program for elderly or disabled persons.