Gasoline prices, which have soared 27 percent in the past three months, are headed upward in coming weeks to perhaps the third-highest level ever, Energy Secretary Spencer Abraham said April 17, according to the Washington Post. U.S. gas prices may hit a summer-long average of $1.46 for a gallon of unleaded regular, with a one-week peak of $1.55 sometime in May or June, as families take to the roads in warmer weather and later head off on summer vacations, Abraham said. As drivers dig deeper into their wallets, however, there is at least a little good news: This year's summer-long mark is likely to stay below last year's average of $1.54, partly because petroleum inventories are higher this April than they were a year ago, according to the Post.