Gas Prices Fell Five Cents In Tennessee This Past Week. According To Triple-A, The Gas Price Average Is Now $3.11, Which Is Seven Cents More Expensive Than A Month Ago And Two Cents More Than A Year Ago. AAA Spokeswoman Megan Cooper Said If Market Conditions Persist, It’s Likely We Could See Gas Prices Hold Steady Again This Week. Tennessee Is The Third Least Expensive Market In The Nation.