It is the duty of the members of the Tennessee highway patrol, under the direction of the commissioner of safety, to:
(1) Patrol the state highways and enforce all laws, and all rules and regulations of the department of transportation regulating traffic on and use of those highways; and
(2) Assist the department of revenue and the county clerks of the state in the collection of all taxes and revenue going to the state, and in the enforcement of all laws relating to same.