Gotthard Base and Railway Tunnel
- Case Image:
- Key Facts:
- Country: Switzerland
- Year of construction: 1993 (sounding drills), 1996 (preparations), 4 February 1999 (official start, first blasting), 2003 (mechanical excavation)
- Year of completion: 2016
- Client: Swiss Confederation
- Tunnel construction company: AlpTransit Gotthard AG (ATG)
- Tunnel operator: SBB
- Start of daily passenger service: 11 December 2016
- Photo credits: AlpTransit Gotthard Ltd
The Gotthard Base Tunnel is the longest tunnel of the world, 57km long. The tunnel shortens travel distance through the Alps and reduces the number of freight trains.