Germany has opened the first three-mile stretch of a bicycle highway that will eventually span over 62 miles, connecting 10 western cities including Duisburg, Bochum, and Hamm, as well as four universities.

Like a traditional highway, this bicycle highway has passing lanes, overpasses and underpasses for crossroads, and even streetlights. However, cyclists won't have to worry about trucks zooming by or bus lanes. It's just a clear path for bikes

http://www.natureknows.org/2016/01/germany-opens-62-mile-bicycle-highway-that-is-completely-car-free.html?m=1