Here in non-urban America public transportation is limited. The latest round of CAFE standards were negotiated with the auto industry. SUV's are getting lighter and more aero friendly than the original Blazers and Ramchargers. The critical measurements are the grams/mile of emissions and the passenger-miles per gallon. I would reduce the tax on diesel fuel and allow biodiesel to be tax free. Consider the Chevy Impala of today is twice as fuel efficient as the 1960's version. The goal is 500 passenger-miles per gallon.
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