Motorists have received a measure of relief at the gas pump for two straight weeks, with prices in metro Atlanta dropping as much as 15 cents since peaking at $3.87 a gallon earlier this month.

The good news? Prices should drop even further. The bad? Not for long.

In a spring that's already seen prices higher than $4 a gallon, the worst is likely not over, fuel experts say.

"While it’s very likely retail gas prices will retreat further this week, it doesn’t necessarily mean we’ve seen the peak price for 2012," said Jessica Brady, a spokeswoman for AAA, The Auto Club Group.