section_path: Transportation
section_name: Transportation
paragraph_text: Transportation
  
  The region is serviced by 4,200 km (2,600 mi) of roads used by six million vehicles per year. Train travel is well established in the Alps, with, for instance 120 km (75 mi) of track for every 1,000 km (390 sq mi) in a country such as Switzerland. Most of Europe's highest railways are located there. In 2007, the new 34.57 km-long (21.48 mi) Lötschberg Base Tunnel was opened, which circumvents the 100 years older Lötschberg Tunnel. With the opening of the 57.1 km-long (35.5 mi) Gotthard Base Tunnel on June 1, 2016, it bypasses the Gotthard Tunnel built in the 19th century and realizes the first flat route through the Alps.
  
  Some high mountain villages are car-free either because of inaccessibility or by choice. Wengen, and Zermatt (in Switzerland) are accessible only by cable car or cog-rail trains. Avoriaz (in France), is car-free, with other Alpine villages considering becoming car-free zones or limiting the number of cars for reasons of sustainability of the fragile Alpine terrain.
  
  The lower regions and larger towns of the Alps are well-served by motorways and main roads, but higher mountain passes and byroads, which are amongst the highest in Europe, can be treacherous even in summer due to steep slopes. Many passes are closed in winter. Several airports around the Alps (and some within), as well as long-distance rail links from all neighbouring countries, afford large numbers of travellers easy access.