Declines in domestic and foreign production are to blame for higher US gas prices, analysts say. Some in the industry see $5-a-gallon gas in 2012, while others say supplies will increase to halt the rise.
Oil pipeline repairs were completed in Chicago after major leaks and oil was expected to flow Friday.
Oil spills in recent weeks, from Canadian-owned pipelines that supply Midwest refineries, are another sign of nation's aging infrastructure. Latest spill expected to raise Midwest gas prices by 30 cents a gallon for several weeks.
Road trips aren't a bad idea this summer as analysts estimate gas prices will stay fairly stable and below $3 a gallon.