The last tunnel, the fifty seven kilometres (35 mi) Gotthard Foundation Tunnel (a double-tube railway tunnel), opened in 2016. At about 500 metres above sea amount, it provides for the first time a flat route throughout the massif and the Alps from the northern plains at Erstfeld on the southern https://maduraicabsase47925.blogminds.com/verkehr-gotthard-nordportal-can-be-fun-for-anyone-28006288