The average U.S. price of regular-grade gasoline surged 13 cents a gallon (3.8 liters) over the past two weeks, to $2.91. Industry analyst Trilby Lundberg of the Lundberg Survey says one of the reasons for the spike is an increase in crude oil costs.

Lundberg says Sunday that prices at the pump have jumped 25 cents over the past month and 60 cents over the past 14 weeks. Locally, gas prices in Indiana ranged from $2.50 to $2.95 a gallon, according to GasBuddy.com.

The highest average price in the nation is $4.04 a gallon in the San Francisco Bay Area, while the lowest average is $2.45 in Baton Rouge, Louisiana.