It’s been 40 years since diesel fuel was last viewed as cheap and 50 years since the first federal Clean Air Act was passed.  In the decades since, a vast whirlwind of societal, political, economic and technological change has remarkably recast trucking into a solidly green industry.  Yet reducing fuel consumption by integrating the design of highway tractors and trailers to drastically slash their wind resistance remains the holy grail of aerodynamics for commercial ...

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