Tennessee drivers continue to see a drop in gasoline prices. Gas prices throughout the state averaged about $2.30 for a gallon of unleaded gas. Prices continued to decline for 36 consecutive days, falling for a total of 28 cents in that time. AAA says that retail prices are still somewhat inflated due to the recent hurricanes. You can find gasoline for as low as $2.09 a gallon in Crossville, while in Rockwood, the lowest price is $2.14 per gallon.