The Price Of Oil Continues To Be The Main Driver Of Gas Prices. As Oil Gets Cheaper, It Becomes Less Expensive To Produce Gas, So Prices In East Tennessee Have Fallen Again. Stephanie Milani With AAA Auto Club Says Gas Prices Have Fallen 29 Of The Last 32 Days, Averaging $2.39 A Gallon This Week In The Tri Cities Region. Oil Analysts Believe The Recent Signing Of The Iranian Nuclear Deal Will Mean The Addition Of Millions Of Barrels Of Oil To The World’s Oil Market Which Could Result In Even Lower Prices At The Pump.