Tennessee Code Title 55. Motor and Other Vehicles § 55-26-101

(1) “Pedal carriage,” also known as “quadricycle,” means a nonmotorized bicycle with four (4) or more wheels operated by one (1) or more persons for the purpose of, or capable of, transporting additional passengers in seats or on a platform made a part of or otherwise attached to the pedal carriage. “Pedal carriage” does not include a bicycle with trainer or beginner wheels affixed thereto, nor shall it include a wheelchair or other vehicle with the purpose of operation by or for the transportation of a disabled person, nor does it include a tricycle built for a child or an adult with a seat for only one (1) operator and no passenger; and

(2) “Rickshaw,” also known as “pedicab,” means a nonmotorized bicycle with three (3) wheels operated by one (1) person for the purpose of, or capable of, transporting additional passengers in seats or on a platform made a part of or otherwise attached to the rickshaw. “Rickshaw” does not include a bicycle built for two (2) where the operators are seated one behind the other, nor shall it include the operation of a bicycle with trainer or beginner wheels affixed thereto, nor does it include a wheelchair or other vehicle with the purpose of operation by or for the transportation of a disabled person.