As used in this chapter:
(A) "Carrier" means any person, engaged in the highway transportation of hazardous materials, in commerce, into, within, or through this state.
(B) "Designated routes" means those highway routes on which hazardous materials must be transported.
(C) "Hazardous materials" means nonradioactive hazardous materials of a type or in a quantity that requires the transport vehicle to be placarded pursuant to 49 C.F.R. 172, as effective on the date referenced in paragraph (C) of rule 4901:2-8-02 of the Administrative Code.
(D) "Restricted routes" means those highway routes on which hazardous materials may not be transported.
(E) "Routing designation" means any regulation, limitation, or restriction applicable to the highway transportation of hazardous materials over a specific highway route or portion of a route.