An undated file photo of a gas pump.
TRENTON, N.J. - Gas prices ticked up slightly in New Jersey and dipped a bit around the nation at large with the end of the summer driving season.
AAA Mid-Atlantic says the average price of a gallon of regular gas in New Jersey on Friday was $3.21, up a penny from a week ago.
Drivers were paying an average of $2.22 a gallon a year ago at this time.
The national average price for a gallon of regular gasoline was $3.17, down a penny from last week.
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