(WASHINGTON) — The average price of a gallon of regular gas is now $3.87, up nearly 4 cents from a week ago and over 30 cents from a year ago, according to the Department of Energy.
Last week, the average gas price was $3.83 a gallon, which matched the previous March record according to data going back to 1990.
The West Coast was once again the most expensive region, with an average gas price of $4.23, up almost 2 cents from last week and an increase of over 37 cents from a year ago.
The least expensive region was the Rocky Mountain region, at $3.62 a gallon. That region had the highest increase from last week: 14 cents. Gas in that region climbed almost 24 cents from a year ago.
Copyright 2012 ABC News Radio
Brian Stelter, CNN Money
Scott Zamost and Drew Griffin, CNN Newswire