Summertime in TennesseeTravel Green Tip #8: Slow down, calm down, save gas. Slower speeds (55-70 mph) and less aggressive driving really boost gas mileage (between 12 and 31 percent!). Leave the high speeds, hard braking and aggressive acceleration to the stunt drivers. more. More Tips Summer Gems: Need a quick look at cool places for hot summer fun? Click on one of the topics below for a map of places to go exploring.
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