Tennessee Code Title 55. Motor and Other Vehicles § 55-8-195

(a) The department of transportation is authorized to promulgate rules and regulations directing truck tractors and semitrailers, as defined in § 55-8-101, to specific lanes, as indicated by appropriate highway signage on interstate and multilane divided highways that are three (3) or more lanes in each direction. Rules and regulations promulgated pursuant to this section shall not apply when truck tractors and semi trailers are passing other motor vehicles.

(b) A violation of the rules and regulations promulgated pursuant to this section is a Class C misdemeanor, punishable by a fine of not more than fifty dollars ($50.00).