Hovenring (located in the Netherlands) is the world’s first suspended bicycle path roundabout. Love it!
Designed by Ipv Delft, Hovenring comprises of a 70-metre (230 ft) tall central pylon, 24 steel cables and a circular bridge deck made out of circa approximately 1,000 tons of steel. The cables are attached to the inner side of the bridge deck, right where the bridge deck connects to the circular, concrete counter weight. This helps prevent torsion within the 72-metre (236 ft) diameter bridge deck. To further ensure stability, concrete was added to sections of the bridge deck along with M-shaped supports near the approach spans.
Construction started on 11 February 2011 and the new crossing first opened on 30 December 2011 but had to closed shortly thereafter due to unexpected vibrations in the cables caused by wind. After extensive research by structural experts, two types of dampers (high frequency and low frequency) were attached to the cables to resolve the vibration issues.