(a) A bus with a length of not more than forty-five feet (45′) may be operated on a highway of this state.
(b)
(1) No bus with a trailer attached, the total length of which combination, including any part of the body or load, exceeds sixty-five feet (65′) shall be operated on any highway.
(2) No school bus as defined in § 55-8-101 transporting children to or from school or for extracurricular activities shall be operated on any highway with a trailer attached.