Bay Area drivers could get a friendly push from the Metropolitan Transportation Commission to fight climate change through "smart driving." This means: going easy on fuel consumption by avoiding sudden acceleration, keeping their tires inflated, ditching the golf clubs in the truck, keeping their cars tuned up, and most of all, following the goddamn speed limit.

This $2.4 million public education campaign would also help drivers track their behavior — think of it as the analogue of counting calories in a regular diet — either through a mobile app or on a website.

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But, mostly, just follow the speed limit. No public education necessary! There are signs telling drivers how to do it all over the place, already.

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