The national average price of gasoline will hit an all time low tomorrow for the first time since December of 2010.

Sliding gas prices are projected to save the consumer up to $500 per year and are coming just in time to boost spending during the holiday season.

The bonus at the pumps represents the biggest benefit to consumers to date from a record boom in domestic oil production that has contributed to a global crude surplus and helped bring down international prices. 

While gas prices have been dropping fast over the past few weeks, drivers shouldn't get used to the free fall.

Seasonal swings and other factors will likely raise the price slightly, but we are on track for the lowest annual average in four years - and the 2015 average is projected to be even lower.

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