Elbe Tunnel (1975)

The New Elbe Tunnel, often simply called Elbtunnel, is a subterranean Elbe River crossing in northern Germany located in Hamburg. Wikipedia

• Official name:  Elbtunnel
• Location:  Crosses under the Elbe in Hamburg, Germany
• Route:  Bundesautobahn 7
• Work begun:  1968
• Opened:  January 10, 1975
• Operator:  Federal Republic of Germany, Autobahnmeisterei
• Traffic:  123,000
• Length:  3,325 metres
• Number of lanes:  8
• Data source:  DuckDuckGo