Blackwall Tunnel from immigrants; the tunnel lining was manufactured in Glasgow, while the manual labour came from provincial England, particularly Yorkshire. The tunnel was officially opened by the Prince of Wales on 22 May 1897. The total cost of the tunnel was £1.4 M and 800 men were employed in its construction, during which seven deaths were recorded. The southern entrance gateway to the tunnel, also known as Southern Tunnel House, was designed by LCC architect Thomas Blashill and was built just before the tunnel was completed. It comprises two floors with an attic. Today the western bore is only used for
Gotthard Road Tunnel north-south line in Switzerland. It was opened in 1882. In this category it is no longer the record-holder. The Seikan Tunnel in Japan and the Channel Tunnel between the United Kingdom and France are both in excess of . Under construction since 2002 and opened on 1 June 2016, the Gotthard Base Tunnel (a second rail tunnel, long), is the world's longest. It was built for the use of trains travelling from northern Switzerland to the Ticino area and beyond. The Gotthard Tunnel is the core and culminating point of the A2 motorway in Switzerland, running south from Basel through