By 1972 there were nearly one million tractor-trailer rigs hauling every conceivable kind of cargo on America's roads. Can you imagine the variety of trucks you would have seen at truck stops across the country? But the 1970s proved to be a decade of incredible change for the over-the-road trucking industry, and by 1980 fuel efficiency became a prime concern for companies. At this time, airfoils and other aerodynamic aids began to appear and trucks...
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Transportation