The Gotthard Base Tunnel is a railway tunnel through the Alps in Switzerland. It opened in June 2016 and full service began the following December. With a route length of 57.09 km (35.5 mi), it is the world's longest railway and deepest traffic tunnel and the first flat, low-level route through the Alps. It lies at the heart of the Gotthard axis and constitutes the third tunnel connecting the cantons of Uri and Ticino, after the Gotthard Tunnel and the Gotthard Road Tunnel.
The Lötschberg Base Tunnel (LBT) is a 34.57 km (21.48 mi) railway base tunnel on the BLS AG's Lötschberg line cutting through the Bernese Alps of Switzerland some 400 m (1,300 ft) below the existing Lötschberg Tunnel. It runs between Frutigen, Bern, and Raron, Valais.
The Gotthard Tunnel is a 15-kilometre-long (9.3 mi) railway tunnel that forms the summit of the Gotthard Railway in Switzerland. It connects Göschenen with Airolo and was the first tunnel through the Saint-Gotthard Massif in order to bypass the St Gotthard Pass. It was built as single bore tunnel accommodating a standard gauge double-track railway throughout. When opened in 1882, the Gotthard Tunnel was the longest tunnel in the world.
The Fehmarn Belt fixed link or Fehmarn Belt tunnel is an under-construction immersed tunnel, which will connect the Danish island of Lolland with the German island of Fehmarn, crossing the 18-kilometre-wide (11 mi) Fehmarn Belt in the Baltic Sea.
Hochtief AG is a global provider of infrastructure technology and construction services, with locations in North America, Australia, and Europe. The Essen based company is primarily active in the fields of high tech, energy transition, and sustainable infrastructure. With the international projects making up 95% of the company's revenue, Hochtief was among the largest international construction firms in 2023.
The Gotthard railway, named after the Saint-Gotthard Massif which it crosses, is the Swiss trans-alpine railway line from northern Switzerland to the canton of Ticino. The line forms a major part of an important international railway link between northern and southern Europe, especially on the Rotterdam-Basel-Genoa corridor. The Gotthard Railway Company was the former private railway company that financed the construction of and originally operated that line.
Bilfinger SE is a European multinational company specialized in civil and industrial construction, engineering and services based in Mannheim, Germany.
Ralph Brazelton Peck was a civil engineer specializing in soil mechanics, the author and co-author of popular soil mechanics and foundation engineering text books, and Professor Emeritus of Civil Engineering at the University of Illinois Urbana-Champaign. In 1948, together with Karl von Terzaghi, Peck published the book Soil Mechanics in Engineering Practice, an influential geotechnical engineering text which continues to be regularly cited and is now in a third edition.
Herrenknecht AG is a German company that manufactures tunnel boring machines (TBMs). Headquartered in Allmannsweier, Schwanau, Baden-Württemberg, it is the worldwide market leader for heavy TBMs.
Implenia is a Swiss real estate and construction services company with activities in development and civil engineering in Switzerland and Germany. Implenia is also active in tunneling and related infrastructure construction in Austria, France, Sweden, Norway and Italy. The Group was formed at the beginning of 2006 from the merger of Basel-based Batigroup Holding AG with Geneva-based Zschokke Holding SA. The headquarters are located in Glattpark (Opfikon) in the canton of Zurich. Implenia is one of the 500 largest companies in Switzerland.
Porr AG is a construction group listed on the Vienna Stock Exchange with its headquarters in Vienna. It is one of the largest Austrian construction companies and is active nationally and internationally in all sectors of the construction industry: from civil engineering including traffic route construction, tunnelling and special civil engineering, to building construction, environmental engineering and facility management.
The Swiss National Redoubt is a defensive plan developed by the Swiss government beginning in the 1880s to respond to foreign invasion. In the opening years of the Second World War the plan was expanded and refined to deal with a potential German invasion. The term "National Redoubt" primarily refers to the fortifications begun in the 1880s that secured the mountainous central part of Switzerland, providing a defended refuge for a retreating Swiss Army.
Kandersteg is a railway station in the Swiss canton of Bern and municipality of Kandersteg. The station is located on the Lötschberg line of the BLS AG, and is the first station to the north of the Lötschberg tunnel.
Frutigen is a railway station in the Swiss canton of Bern and municipality of Frutigen. The station is located on the Lötschberg line of the BLS AG, and is the junction point where the routes via the older Lötschberg tunnel and the more recent Lötschberg base tunnel diverge.
The West railway between the capital Vienna and Salzburg is being upgraded. Most new sections have a continuous maximum design speed of 250 km/h (155 mph).
Frutiger AG, commonly referred to as Frutiger Group, is a Swiss civil engineering, procurement, construction and real estate company headquartered in Thun, Switzerland. Frutiger is the third largest construction company in Switzerland after Implenia and Marti Holding. In 2021, Frutiger had an annual turnover of CHF 802 millions and over 2,600 employees. Most prominently Frutiger forms part of the Transco consortium responsible for the Sedrun work site of the Gotthard Base Tunnel. Other companies involved in the project include Bilfinger SE, Implenia and Impresa Pizzarotti.
The Semmering Base Tunnel is a railway tunnel under construction between Gloggnitz and Mürzzuschlag in Austria underneath the Semmering Pass. The existing route is 41 km long and the Semmering Base Tunnel will be 27.3 km long. The new route will offer time savings of up to 30 minutes, partly on account of the shorter route and partly on account of the higher speed limit.
A ballastless track or slab track is a type of railway track infrastructure in which the traditional elastic combination of sleepers and ballast is replaced by a rigid construction of concrete or asphalt.
Afcons Infrastructure Limited is an Indian multinational construction and engineering company based in Mumbai. The company provides EPC services and is involved in the construction of infrastructure projects such as bridges, flyovers, metros, tunnels, pipelines, roads, ports, barrages, oil and gas projects. It has been a part of the Shapoorji Pallonji Group since 2000.
The Eppenberg Tunnel is a railway tunnel in the Canton of Solothurn, Switzerland. It is part of the 'Future Development of Railway Infrastructure' plan and increases capacity on the Aarau–Olten line in the Schönenwerd–Däniken section.
