This is the IJ Klopper, a futuristic tunnel in Amsterdam with dramatic spiral entrances that are solely meant for cyclists. The tunnel project was proposed by architectural firm, Syb van Breda & Co. to connect Amsterdam Central Station and Amsterdam Noord. The impressive tunnel has a spiral system with a 50-meter wide drum on both ends. Pedestrians can also use the tunnel using separate lanes with access through lifts, stairs and escalators.
This architectural gem may seem challenging to ride up, but it really only has a gentle slope for cyclists to spiral their way up or down. The IJ Klopper could also resolve the increase of traffic in the area, and help relieve the local ferry system, in which thousands of cyclists depend on daily.
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The IJ Klopper is also reportedly cost-efficient and is “three times cheaper than a bridge over its lifetime,” notes architect Syb van Breda. In mid-2019, the tunnel was originally proposed, however the Amsterdam council has held off on making a decision. Yet public pressure is mounting on the council to find a solution.