AAA Mid-Atlantic: Gas prices hit an average of $4 a gallon in Maryland

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Maryland has joined a club to which most don't want to belong: States where the average gas price is $4 or more per gallon.

According to AAA Mid-Atlantic Thursday, Maryland's average gas price hit $4 a gallon, or 6 cents than the national average. In Baltimore, motorists pay an average of $3.99 a gallon, down from $3.65 a year ago.

The difference between gas prices across the state is about 50 cents. The priciest fuel, at $4.30 a gallon, is sold in Bethesda; while motorists can find gas as low as $3.80 per gallon in Kennedyville on the Upper Eastern Shore to Ridgely in Caroline County, AAA reported.

On average, the most expensive region in the state is the Maryland suburbs outside Washington where drivers pay an average of $4.05 a gallon. That's also Maryland's record high price for gas, which was reached in June 2008.

Besides Maryland, D.C. and 10 other states now are paying an average of $4 or more a gallon. AAA said consumers can expect small increases in prices until the peak driving season in the summer.