What project is a rail infrastructure project that includes a twin rail tunnel and the building of the Arden railway station?  
Melbourne Metro Rail Project
Arden railway station, Melbourne
Arden railway station is a planned station to be built as part of the Melbourne Metro Rail Project.
 It will be built in North Melbourne below Laurens and Arden Streets.
 The station will be built using the cut-and-cover method.
 Construction is scheduled to commence in 2018.
Melbourne Metro Rail Project
The Melbourne Metro Rail Project (marketed as the Metro Tunnel and formally known as the Metro Rail Capacity Project), is a metropolitan rail infrastructure project currently under construction in Melbourne, Australia.
 It includes the construction of a twin rail tunnel between South Kensington station (north west of the Melbourne City Centre) and South Yarra (in the south east) with five new underground stations.
Schuman-Josaphat tunnel
The Schuman-Josaphat tunnel is a 1250 m double track rail tunnel in Brussels, which entered into service on 4 April 2016.
 It links line 161 (Brussels-Namur) just after Meiser station and line 26 (Halle-Vilvoorde) at the Cinquantenaire/Jubelpark tunnel just before Schuman station.
 The line is numbered L161A.
 A key component of the Brussels RER project, it passes beneath avenue Plasky/Plaskylaan, place de Jamblinne de Meux/Jamblinne de Meuxplein and the Cortenbergh/Kortenberg road tunnel.
 The position of the tunnel in the Brussels rail network is shown in the simplified map on the right.
 Benefits of the project include: Fréjus Rail Tunnel
The Fréjus Rail Tunnel (also called Mont Cenis Tunnel) is a rail tunnel of 13.7 km length in the European Alps, carrying the Turin–Modane railway through Mount Cenis to an end-on connection with the Culoz–Modane railway and linking Bardonecchia in Italy to Modane in France.
 Its mean altitude is 1,123 m and it passes beneath the "Pointe du Fréjus" (2,932 m) and the "Col du Fréjus" (2,542 m). NS Railinfratrust
The Railinfratrust Company (RIT) is the owner of the rail infrastructure in the Netherlands.
 ProRail B.V. is the part of RIT that takes care of maintenance and extension of the national railway network infrastructure, of allocating rail capacity, and of traffic control.
 NS Railinfratrust is a government agency but is not the same company as Nederlandse Spoorwegen.
 NS Railinfratrust consists of the following infrastructure management organisations: "Railinfrabeheer" (Rail Infrastructure Management, RIB); "Railned" (railway capacity allocation) (planning more than 52 hours before the day of the train service); "Railverkeersleiding" (Traffic Control) (planning from 52 hours before the day of the train service) Lyttelton Rail Tunnel
The Lyttelton Rail Tunnel, initially called the Moorhouse Tunnel, links the city of Christchurch with the port of Lyttelton in the Canterbury region of New Zealand’s South Island.
 It is the country’s oldest operational rail tunnel, and is on the Lyttelton Line, one of the first in the province.
 On completion in 1867 it became the first tunnel in the world to be taken through the side of an extinct volcano, and at 2.7 km, the longest in the country.
 Its opening made the Ferrymead Railway, New Zealand's first public railway line, obsolete. Delft railway station
Delft is the main railway station of Delft, the Netherlands, located on a section of the oldest railway line in the country, between the cities of The Hague and Rotterdam.
 Along with a new 2.3 km rail tunnel under the city centre, the current station opened on 28 February 2015.
 The new building, which integrates the station hall with the city's municipal offices, was designed by Mecanoo, an international architecture firm that originated in Delft.
 The project also included a rebuilt bus station, tram stops and improved bicycle parking. Chota Char Dham Railway
The Chota Char Dham railway (Hindi: छोटा चार धाम रेलवे) is Indian Railways's proposed twin railway lines, will compliment the Char Dham Highway project by connecting the holiest places of Hinduism called Chota Char Dham, from the existing Doiwala station near Dehradun to Gangotri and Yamunotri via a fork at Uttarkashi and another set of twin rail links from the upcoming railway station at Karnaprayag to Kedarnath and Badrinath via a fork at Saikot.
 The line is also of strategic military importance and has designated a national project. City Rail Link
The City Rail Link (CRL) is a rail project currently under construction in Auckland, New Zealand.
 The project consists of the construction of a 3.5 km long double-track rail tunnel underneath Auckland's city centre, between Britomart Transport Centre and Mount Eden Railway Station.
 Two new underground stations will be constructed to serve the city centre; Aotea Station near Aotea Square and Karangahape Station near Karangahape Road.
 Britomart will be converted from a terminus station into a through station and Mount Eden Station will be completely rebuilt with four platforms to serve as an interchange between the new CRL line and the existing Western Line. Robertson Tunnel
The Robertson Tunnel is a twin-bore light rail tunnel through the Tualatin Mountains west of Portland, Oregon, United States, used by the MAX Blue and Red Lines.
 The tunnel is 2.9 mi long and consists of twin 21 ft tunnels.
 There is one station within the tunnel at Washington Park, which at 79 m deep is the deepest subway station in the United States and the fifth-deepest in the world.
 Trains are in the tunnel for about 5 minutes, which includes a stop at the Washington Park station.
 The tunnel has won several worldwide engineering and environmental awards.
 It was placed into service September 12, 1998.