The German Autobahn, renowned for precise engineering and infamous for unlimited speeds. Roughly two thirds of the Autobahn system has no speed limit and the average speed is about 80 mph (130 km per hour) but at any time, those that can are going 100 mph (160 km per hour) and up. The Autobahn is nearly 7300 miles in length, which is enough to cross the United States twice. All packed into an area roughly the size of Montana! Megastructures Autobahn profiles what it takes to build, operate, maintain and drive the world's ultimate super highway.
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