Gas prices are down again. Triple-A reports the national average price for regular is down to $3.90 a gallon. That's a penny lower than yesterday as prices keep dropping. The lowest priced gas in the country is in Georgia, where the statewide average is $3.26 a gallon. The most expensive is in California, with a statewide average of $6.15 a gallon. While they are falling now, fuel prices across the board are expected to rise for the winter.