ROANOKE, Va. (WDBJ/ GasBuddy Release) – Average gasoline prices in Roanoke have risen 10.2 cents per gallon in the last week, averaging $3.02/g Monday, according to GasBuddy’s survey of 155 stations in Roanoke. Prices in Roanoke are 1.3 cents per gallon lower than a month ago and stand 37.8 cents per gallon lower than a year ago. The national average price of diesel is unchanged from a week ago and stands at $3.54 per gallon.