Gas prices hold in record territory
Drivers in Alaska pay the most on average, while South Carolina has the least expensive gas.
NEW YORK (CNNMoney.com) -- The high cost of gas is one thing Americans didn't celebrate this holiday weekend.
Retail gas prices in the U.S. inched higher overnight to a record high for the seventh straight day, a daily survey by auto club AAA showed Sunday.
The national average price for a gallon of regular gas rose to an all-time high of $4.107, up from $4.103 the previous day.
Gas prices have surged roughly 40% in the past year.
Alaska has the highest gas prices in the nation. Drivers in the state pay an average of $4.610 a gallon for regular gas.
The state with the lowest gas prices is South Carolina, where a gallon of gas costs $3.905 on average. Just 13 states have average prices beloe $4.
The national average price for diesel fuel ticked higher to $4.793 a gallon, up from $4.782 the day before.
Record high gas prices have pinched consumers and forced many Americans to cut back on the amount of driving they do.
Thirty-one percent of Americans have canceled or shortened their planned holiday weekend vacation because of rising gas prices, according to a CNN/Opinion Research poll released this week.
The impact goes beyond driving. In a yearlong experiment aimed at reducing the state's energy costs and commuters' gasoline expenses, Utah is about to become the first state to switch to a four-day workweek for thousands of government employees. 
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