World's longest train tunnel

Switzerland is building in the NEAT Gotthard Base tunnel, which is the world’s longest train tunnel, with 57 km long parallel tracks crossing the Alps. The tunnel should become operational at the end of 2016.

Journalists stand beside rail tracks at the construction site in the NEAT Gotthard Base tunnel near Sedrun

Journalists stand beside rail tracks at the construction site in the NEAT Gotthard Base tunnel near Sedrun April 2, 2013. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLANDBUSINESS TRAVEL - Tags: TRAVEL BUSINESS EMPLOYMENT CONSTRUCTION) - RTXY5OX

Workers have a break during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

Workers have a break during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL) - RTR31QEL

Red lights illuminate the construction site of the of the NEAT Gotthard Base Tunnel at the Erstfeld-Amsteg section

Red lights illuminate the construction site of the of the NEAT Gotthard Base Tunnel at the Erstfeld-Amsteg section October 5, 2010. With a length of 57 km (35 miles) crossing the Alps, the world's longest train tunnel should become operational at the end of 2017. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION TRANSPORT TRAVEL) - RTXT2QE

Miner stands in front of drill machine 'Sissi' after it broke through the rock at the final section at construction site of the NEAT Gotthard Base Tunnel

A miner stands in front of the drill machine 'Sissi' after it broke through the rock at the final section Faido-Sedrun, at the construction site of the NEAT Gotthard Base Tunnel October 15, 2010. With a length of 57 km (35 miles) crossing the Alps, the world's longest train tunnel should become operational at the end of 2017. REUTERS/Christian Hartmann (SWITZERLAND - Tags: TRANSPORT BUSINESS BUSINESS CONSTRUCTION POLITICS IMAGE OF THE DAY TOP PICTURE) FOR BEST QUALITY IMAGE SEE: GM1E6CG0XUC01 - RTXTGU6

Miners wave with the flags of their home countries as they celebrate as fireworks explode after a giant drill machine broke through the rock at the final section Sedrun-Faido, at the construction site of the NEAT Gotthard Base Tunnel

Miners wave with the flags of their home countries as they celebrate after a giant drill machine broke through the rock at the final section Sedrun-Faido, at the construction site of the NEAT Gotthard Base Tunnel March 23, 2011. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS TRAVEL EMPLOYMENT) - RTR2KAQH

People take pictures as drill machine breaks through rock at the construction site of the NEAT Gotthard Base Tunnel

Miners and visitors take pictures as a giant drill machine breaks through the rock at the western tunnel section Sedrun-Faido, at the construction site of the NEAT Gotthard Base Tunnel March 23, 2011. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a lenght of 57 km (35 miles). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS TRAVEL EMPLOYMENT) - RTR2KANI

Miners celebrate as fireworks explode after a giant drill machine broke through the rock at the final section Sedrun-Faido, at the construction site of the NEAT Gotthard Base Tunnel

Miners celebrate as fireworks explode after a giant drill machine broke through the rock at the final section Sedrun-Faido, at the construction site of the NEAT Gotthard Base Tunnel March 23, 2011. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles). REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS TRAVEL EMPLOYMENT) - RTR2KAQD

Visitors walk through the construction site of the NEAT Gotthard Base Tunnel at the Erstfeld-Amsteg section

Visitors walk through the construction site of the NEAT Gotthard Base Tunnel at the Erstfeld-Amsteg section October 5, 2010. With a length of 57 km (35 miles) crossing the Alps, the world's longest train tunnel should become operational at the end of 2017. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION TRANSPORT TRAVEL) - RTXT2QF

Workers cycle past the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld

Workers cycle past the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL) - RTR31QCK

An employee of AlpTransit Gotthard Ltd and a visitor stand at the NEAT Gotthard Base tunnel near Erstfeld

An employee of AlpTransit Gotthard Ltd and a visitor stand at the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL) - RTR31QCQ

Workers use torque wrenches to fix screw nuts during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

Workers use torque wrenches to fix screw nuts during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

Workers use torque wrenches to fix screw nuts during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

Workers use torque wrenches to fix screw nuts during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A worker uses a measuring gauge during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

A worker uses a measuring gauge during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

An engineer sits on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld

An engineer sits on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. The train, which is 481 metres (1578 ft) long and weighs 787 tons, is constructed to produce concrete for the installation of the railway tracks in the tunnel. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A worker prepares tools and materia during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

A worker prepares tools and material during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

Workers drive on a special vehicle during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

Workers drive on a special vehicle during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

An Austrian and a German national flag fly on mobile machinery during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

An Austrian and a German national flag fly on mobile machinery during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A worker adjusts a laser measuring gauge during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

A worker adjusts a laser measuring gauge during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A worker receives instructions from an engineer during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld

A worker receives instructions from an engineer during the installation of the railway tracks in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

An employee looks on monitors to control the mixture of concrete on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld

An employee looks at monitors to control the mixture of concrete on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. The train, which is 481 metres (1578 ft) long and weighs 787 tons, is constructed to produce concrete for the installation of the railway tracks in the tunnel. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A worker stands on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld

A worker stands on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. The train, which is 481 metres (1578 ft) long and weighs 787 tons, is constructed to produce concrete for the installation of the railway tracks in the tunnel. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles ) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

Workers sitting on the special train 'Helvetia' distribute fresh concrete on the track bed of the rails in the NEAT Gotthard Base tunnel near Erstfeld

Workers sitting on the special train 'Helvetia' distribute fresh concrete on the track bed of the rails in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. The train, which is 481 metres (1578 ft) long and weighs 787 tons, is constructed to produce concrete for the installation of the railway tracks in the tunnel. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles ) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

Workers use finishing trowels to plane fresh concrete on the track bed of the rails in the NEAT Gotthard Base tunnel near Erstfeld

Workers use finishing trowels to plane fresh concrete on the track bed of the rails in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A statue of Saint Barbara, the patron saint of miners, stands in front of the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld

A statue of Saint Barbara, the patron saint of miners, stands in front of the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

Workers cycle past the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld

Workers cycle past the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

Workers cycle past the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld

Workers cycle past the northern entrances of the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

An employee of AlpTransit Gotthard Ltd and a visitor stand at the NEAT Gotthard Base tunnel near Erstfeld

An employee of AlpTransit Gotthard Ltd and a visitor stand at the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)

A worker stands on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld

A worker stands on the special train 'Helvetia' in the NEAT Gotthard Base tunnel near Erstfeld May 7, 2012. The train, which is 481 metres (1578 ft) long and weighs 787 tons, is constructed to produce concrete for the installation of the railway tracks in the tunnel. Crossing the Alps, the world's longest train tunnel should become operational at the end of 2016. The project consists of two parallel single track tunnels, each of a length of 57 km (35 miles ) REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: BUSINESS CONSTRUCTION EMPLOYMENT TRAVEL)