"Emergency response vehicle", a fire apparatus, police vehicle, ambulance, or disaster vehicle.
"Highway maintenance vehicle", a vehicle used for the maintenance of highways and roadways: (1) that is owned or operated by the executive office of transportation and public works, a county, a municipality or any political subdivision thereof; or (2) that is owned or operated by a person under contract with the executive office of transportation and public works, a county, a municipality or any political subdivision thereof.
"Operator", any person who operates a motor vehicle as defined in section 1 of chapter 90.
"Person", a natural person, corporation, association, partnership or other legal entity.
"Recovery vehicle", a vehicle that is specifically designed to assist a disabled vehicle or to tow a disabled vehicle.
Mass. Gen. Laws ch. 89, § 7C