Gasoline prices rose another 11 cents in the past two weeks to reach $3.18 a gallon, according to the latest Lundberg Survey of filling stations released Sunday.

The record was the second straight for the twice-monthly survey following the previous $3.07 set two weeks ago.

Gasoline reached a record $3.103 in last week’s Department of Energy weekly filling-station survey and could reach another one Monday afternoon when the new survey is released.

Prices have shot higher as inventory concerns remain about summer driving supplies, Bloomberg reported. The summer driving season will officially begin Friday with the start of Memorial Day weekend.

The nations lowest average pump price was $2.87 in Charleston, S.C., while the highest was $3.59, in Chicago, Lundberg said.