(NAFB) – For the fourth consecutive week, the national average price of gasoline increased, posting a 6.4 cent per gallon gain from a week ago to $3.03 per gallon.

The national average now stands 16.8 cents higher than a month ago and $1.17 per gallon higher than a year ago. The national average price of diesel increased 6.3 cents in the last week and stands at $3.17 per gallon. The jump was largely attributed to the Colonial Pipeline shutdown.

GasBuddy’s Patrick De Haan says, “With the pipeline now back in service, I expect prices to come down in the hardest-hit states.”

De Haan says the drops should lead the national average to fall back under the $3 per gallon mark. But, he cautions, “prices may start to head higher in a few weeks should Memorial Day gasoline demand be red hot.”

The most common U.S. gas price encountered by motorists was $2.89 per gallon, up 20 cents from last week.