 After weeks of declining gas prices due to low oil costs and demand, the price of regular unleaded has inched up a bit and the culprit is a rise in crude oil prices. Plus, Americans are hitting the road for the 4th of July, so demand is up. The Energy Department reports in the past week the price of regular unleaded went up 4 cents nationwide to an average of $3.48 a gallon, still 5 cents less than a year ago. Some places like California are still seeing prices go down. Alex Stone, ABC News.