Tenn. Code Ann. § 54-1-402

The litter prevention and control program may include as one (1) of its components a process by which citizens can report directly to the department of transportation instances of persons littering from motor vehicles onto the state's roads and highways, whether the offenders are intentionally littering or are accidentally dropping objects or debris from an uncovered or improperly secured load. The process may provide the capability for citizens to report litterers online by means of the completion of a standard form, the form to be accessed via the Internet from the program's web site. The department may also make provisions for citizens to report litterers via e-mail and a toll-free telephone line.