Dotting the Interstates, they're overlooked by some and longed for by others. They're truck stops, and today they're bigger and better than ever. Modern Marvels: Truck Stops explores how these mega pit stops have catered to heavy haulers since the Mom and Pop stops of the 1920s all the way to todays high-tech travel centers. Step into the shoes of a trucker at the worlds largest truck stop; fuel up, chow down, grab a spritz, catch a flick, and even stop by the dentist. It's a city unto itself. Get a tour of the truckers' lavish rolling living quarters, and see how they power up their rigs with a high tech parking lot hookup called IdleAire - complete with heat, air conditioning, a telephone line, a computer with high speed Internet, and of course satellite TV. See how 30,000 gallon underground diesel storage tanks are manufactured. And look at the technology used to weigh and inspect a truck while it barely slows down. In an interview with Willie Nelson, the show explores one of the most unique truck stops in the United States and the revolutionary fuel it sells: biodiesel. So buckle up and hop aboard our truckin' convoy as Modern Marvels explores the world of truck stops.