Hamburg is burying the Autobahn and putting parks on top

The Autobahn 7, Germany's longest highway, runs straight through Hamburg. Over the years, it's grown more and more congested, now carrying about 152,000 cars and trucks per day. To deal with the increasing traffic, the city is turning to a pretty conventional solution: widening virtually the entire stretch of the highway that runs through the city. But to deal with the noise — and the way that the highway has severed neighborhoods that were connected before it was built in the 1980s...

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