Gas prices remain above the national average in Pennsylvania. As reported by Triple-A, the average price for a gallon of regular fell yesterday in the Keystone State to just under three dollars and 57 cents, as the average rose to three-44 a gallon. Mississippi drivers continue to enjoy the lowest average prices at the pump, with yesterday’s statewide average rising to just over two-99 a gallon. Prices are still highest in California, where the Golden State average fell slightly to four-82 a gallon.