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One of the persistent challenges of deploying plug-in vehicles has always been metrics: how to evaluate, regulate, incentivize and talk about them to the general public. It's complicated enough transitioning consumers from thinking about miles per gallon to miles per kilowatt hour, particularly ...

We're coming to the end of the time when it makes sense (?) to ride around with a mannequin dressed as Gandalf. Yes, carpool lane access for some hybrid drivers in California will end this year. The deadline gives us a chance to look back and consider what the so-called "Prius perks" got us. ...