Bubenholz Tunnel

The Bubenholz Tunnel is a motorway tunnel in the Swiss canton of Zurich. It forms part of the A51 motorway, which links the A1 motorway with Zurich Airport. The tunnel is 550 m long.

The tunnel replaced several overpasses which existed until the early 2000s, with the intention of cutting noise in the nearby towns of Glattbrugg and Opfikon.