Sec. 5. In addition to the limits and requirements set forth in sections 2 through 4 of this chapter, the maximum length of a:
(1) truck-trailer combination; or
(2) truck-wagon combination;
and its load, used in intrastate transportation, designed and utilized as set forth in section 1(1)(A) and 1(1)(B) of this chapter, is sixty-eight (68) feet.