§47-11-804.

§47-11-804.
   
   (a) No person shall drive a motor vehicle at such a slow speed as to
   impede the normal and reasonable movement of traffic except when
   reduced speed is necessary for safe operation or in compliance with
   law.
   
   (b) Whenever the State Highway Commission or local authorities within
   their respective jurisdictions determine on the basis of an
   engineering and traffic investigation that slow speeds on any part of
   a highway consistently impede the normal and reasonable movement of
   traffic, the Commission or such local authority may determine and
   declare a minimum speed limit below which no person shall drive a
   vehicle except when necessary for safe operation or in compliance with
   law.