TRENTON, N.J. (AP) — Gas prices are still on the increase in New Jersey and around the nation amid longer-than-expected refinery outages on the Gulf Coast following a winter storm. AAA Mid-Atlantic says the average price of a gallon of regular gas in New Jersey on Friday was $2.81, up eight cents from a week ago. Drivers were paying an average of $2.52 a gallon a year ago at this time. The national average price for a gallon of regular gasoline was $2.69, up nine cents from last week. Drivers were paying an average of $2.47 a gallon a year ago at this time.