Tennessee Code Title 55. Motor and Other Vehicles § 55-10-205

(c)(1) Any motor vehicle operator who knowingly ignores a clearly visible and adequate flood warning sign or barricade and drives into a road area that is actually flooded commits reckless driving. In addition to the penalties imposed pursuant to subsection (d), the court may order the operator to pay restitution to defray the taxpayer cost of any rescue efforts related to such violation.

(2) It is an affirmative defense to prosecution under this section, which must be proven by a preponderance of the evidence, that the operator's driving through the flood warning sign or barricade was necessitated by a bona fide emergency.

(3) This subsection (c) shall not apply to an emergency vehicle. “Emergency vehicle” means a vehicle of a governmental department or public service corporation when responding to any emergency, or any vehicle of a police or fire department, or any ambulance.

(d)(1) A violation of this section is a Class B misdemeanor.

(2) In addition to the penalty authorized by subdivision (d)(1), the court shall assess a fine of fifty dollars ($50.00) to be collected as provided in § 55-10-412(b) and distributed as provided in § 55-10-412(c).