Business Gas prices begin climb toward $4.50 a gallon, experts say

Gas prices could hit $4.50 a gallon nationwide by summer because of sanctions on Iran, a frigid winter in Europe, and logistical challenges in the US. The current all-time high is $4.11.

Debbie Noda/The Modesto Bee/AP

Many drivers are already grumbling at gas prices this winter. But by this summer, Friday's AAA average of $3.58 a gallon for regular gasoline may look downright attractive.