Atlanta gas prices continued to inch their way toward the $4-a-gallon mark on Monday, the average climbing about a half-cent since Sunday and 3 cents in the past week.

The average price of $3.75 a gallon for regular unleaded is 29 cents per gallon higher than a month ago, and a full dollar more than the price one year ago, according to gasbuddy.com, a website that tracks gasoline prices across the country.

Just two years ago, on April 25, 2009, the average price of a gallon of gas in metro Atlanta was $1.87.

Metro Atlanta's average on Monday, while high, was 9 cents off the national average of $3.84, the website said.

The lowest price in the area reported on the website Monday morning was $3.57 a gallon, at RaceWay and Murphy USA stations in Acworth in north Cobb County.

Monday's highest price was also in Cobb County, at a Chevron station in Marietta that was charging $4.19, the website reported.