Ahhhh, the glorious open road. Cruisin’ USA. In America, the road trip is a rite of passage, a tradition passed down from generation to generation, and it wouldn’t be possible without the American Interstate Highway system, one of the greatest public works projects ever executed in this country. How long did such a behemoth task take to complete? How many roads were constructed? Who paid for it? How did it affect American culture and industry? And maybe most importantly, what’s the friggin’ coolest 18-Wheeler? On this week's Past Gas – The History of The US Highway System and The Growth of Trucking.

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