Gasoline prices are on the rise once...

Gasoline prices are on the rise once again. The average price of a gallon of gasoline nationwide jumped 2.67 cents to 98.84 cents in the past two weeks, and prices could continue to rise as summer nears, said Trilby Lundberg, an oil industry analyst. “The greatest increases were found in the Midwest, the smallest in the Rocky Mountains region,” said Lundberg, whose Lundberg Survey checks prices at gasoline stations in every state.