The existing Hasseler Tunnel, which was opened in 1867 between Hassel and St. Ingbert, had over the years developed more and more structural defects, so that it could be operated at low speed for safety reasons.
Channel Tunnel | tunnel | The Time Tunnel | Holland Tunnel | Fréjus Rail Tunnel | wind tunnel | Memorial Tunnel | Gotthard Road Tunnel | Severn Tunnel | Queensway Tunnel | Fréjus Road Tunnel | Thames Tunnel | Oslo Tunnel | Mont Blanc Tunnel | Lincoln Tunnel | Clyde Tunnel | Brooklyn–Battery Tunnel | Tunnel über der Spree | Tunnel | Ted Williams Tunnel | Tauern Road Tunnel | North Cape Tunnel | Malpas Tunnel | Lyttelton road tunnel | Khun Tan Tunnel | Gotthard road tunnel | Fréjus road tunnel | Disley Tunnel | Dark at the End of the Tunnel | Channel Tunnel Act 1987 |