U.S. Gasoline Prices Rose 4 Cents in Recent Survey

U.S. gasoline prices rose about 4 cents per gallon in the last three weeks, according to the latest price survey.

The latest Lundberg Survey, conducted on Friday in 38 markets, shows the average price of self-serve regular was $2.77 per gallon, an increase of about 3.9 cents from the last survey on July 23.

Still, the price is likely to drop, since the price of crude oil rose sharply, and then fell, in that period.

"Gasoline has not yet reacted to the crude oil drop of the past week," publisher Trilby Lundberg told CNN.

High unemployment is exerting downward pressure on gasoline prices, Lundberg said.

The highest average price was $3.21 per gallon in San Francisco, while the lowest was $2.54 in Jackson, Mississippi.