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86-679: The Lötschberg Base Tunnel was built as one of two centrepieces of the New Railway Link through the Alps . Construction of the LBT began in 1999 and achieved breakthrough during 2005. It was completed in June 2007 and the first train operations began in December 2007. This initial project was estimated to cost SFr4.3 billion ($ 3.59 billion). The LBT was saturated within a few years of opening due to

172-576: A single-track railway where trains in both directions share the same track. In the earliest days of railways in the United Kingdom, most lines were built as double-track because of the difficulty of co-ordinating operations before the invention of the telegraph . The lines also tended to be busy enough to be beyond the capacity of a single track. In the early days the Board of Trade did not consider any single-track railway line to be complete. In

258-550: A spiral . At Saunderton , England, what became the London-to-Birmingham main line of the Great Western Railway in 1909 was initially part of a single-track branch line from Maidenhead . Down trains follow the route of the old branch line, while up trains follow a more gently graded new construction through a tunnel. This scheme avoided the cost of a new double-track tunnel. Directional running

344-443: A 21 km (13 mi) single-track section. Without a second bore, its overall capacity is greatly reduced. During 2016, a planning contract was awarded for the completion of the second track of the LBT, which has been estimated to cost 1 billion Swiss francs. The resulting plan was presented in spring 2019. In early 2024, Parliament decided to complete the second bore, with an estimated cost of SFr 1.7 billion. The LBT

430-416: A double line might have to be shut down to avoid collisions with trains on those adjacent tracks. These are a form of crossing loop, but are long enough to allow trains approaching each other from opposite directions on single-track lines to cross (or pass) each other without reducing speed. In order for passing lanes to operate safely and effectively, trains must be timetabled so that they arrive at and enter

516-526: A horseshoe curve at 1 in 75 gradient, while the shorter downhill track follows the original single track at 1 in 40 grades. A similar arrangement to Frampton could not be adopted between Rydal and Sodwalls on the Main Western railway line because the 1 in 75 uphill track is on the wrong side of the 1 in 40 downhill track, so both tracks follow the 1 in 75 grade. Another example is at Gunning . Between Junee and Marinna, New South Wales , Australia

602-627: A major bottleneck. For Berlin Stadtbahn the two northern tracks are local S-Bahn and the two other for faster trains. The most notable example of quadruple track in the United States, and perhaps the only four-track section of mainline therein, was the Pennsylvania Railroad 's main corridor through the heart of Pennsylvania around the famous Horseshoe Curve . This line is now owned by Norfolk Southern. Other examples include

688-520: A maximum weight of 3,600 tonnes (4,000 short tons) and a maximum length of 1,500 metres (4,900 ft) have to use the LBT, as they are above the maximum gauge of the existing mountain track. By 2017, the LBT reportedly facilitated the movement of 35.7 million gross tonnes (79 billion pounds) of rail freight. The LBT is operated and monitored from a dedicated control centre based at nearby Spiez. The tunnel incorporates various measures for handling emergency situations; for use in such circumstances,

774-462: A means of accessing the active eastern tunnel; an adjacent exploratory bore driven during the early 1990s has also proved useful for such purposes. The cost of completing the LT was estimated to be around one billion Swiss francs in 2016. That project also includes two parallel bridges over the river Rhône in canton Valais, the 2.6 km (1.6 mi) Engstlige tunnel (built with cut-and-cover method;

860-409: A much lower capacity and would have required an eight months full closure of the line. In early 2024 the choice was made to go for the full option, with an estimated cost of CHF 1.7 billion. Its owner, BLS NETZ AG , presents the LBT as one of the safest, most modern and most technically complex rail tunnels in the world. The company has attributed the tunnel's congestion to the combination of

946-438: A pair of intermediate access tunnels connect with the main bores at a series of underground emergency stations. Trains can also be moved between the two bores via multiple cross-over links spread throughout its length. On 13 March 2020, the second bore of the LBT was temporarily closed to all traffic following the discovery of ingress by both water and sand while remedial work was performed to address this. In addition to cleaning

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1032-596: A second tunnel. An exception is the Hoosac Tunnel , which was duplicated by enlarging the bore. To reduce initial costs of a line that is certain to see heavy traffic in the future, a line may be built as single-track but with earthworks and structures designed for ready duplication. An example is the Strathfield to Hamilton line in New South Wales , which was constructed as mainly single-track in

1118-565: A third track signalled in both directions, so that two tracks are available in the peak direction during rush hours. Triple track is used in some parts of the New York City Subway and on the Norristown High-Speed Line to add supplemental rush-hour services. The center track, which serves express trains, is signalled in both directions to allow two tracks to be used in the peak direction during rush hours;

1204-412: A third track was opened between Whittingham and Branxton in 2011 and Branxton to Maitland in 2012 to equalize the headway in both directions for heavy coal traffic. Triple track could be a compromise between double-track and quad-track ; such a system was proposed south of Stockholm Central Station , but was cancelled in favor of Citybanan . In Melbourne and Brisbane several double track lines have

1290-428: A train failure, or for a fast train to overtake a slow train. Most crossing loops are not regarded as double-track even though they consist of multiple tracks. If the crossing loop is long enough to hold several trains, and to allow opposing trains to cross without slowing down or stopping, then that may be regarded as double-track. A more modern British term for such a layout is an extended loop. The distance between

1376-415: Is an example of a duplication line that was reduced to single-track in most locations, but has since undergone re-duplication in many places between Baltimore and Philadelphia when CSX increased freight schedules in the late 1990s. Also: Some lines are built as single-track with provision for duplication, but the duplication is never carried out. Examples are: When the capacity of a double-track railway

1462-979: Is called duplication or doubling , unless the expansion is to restore what was previously double track, in which case it is called redoubling . The strongest evidence that a line was built as single-track and duplicated at a later date consists of major structures such as bridges and tunnels that are twinned. One example is the twin Slade tunnels on the Ilfracombe Branch Line in the UK. Twinned structures may be identical in appearance, or like some tunnels between Adelaide and Belair in South Australia , substantially different in appearance, being built to different structure gauges . Tunnels are confined spaces and are difficult to duplicate while trains keep on running. Generally they are duplicated by building

1548-487: Is in excess of requirements, the two tracks may be reduced to one, in order to reduce maintenance costs and property taxes. In some countries this is called singling . Notable examples of this in the United Kingdom occurred on the Oxford–Worcester–Hereford, Princes Risborough–Banbury and Salisbury–Exeter main lines during the 1970s and 1980s. In all these cases, increases in traffic from the late 1990s have led to

1634-650: Is naturally more expensive and will take two years longer, but it provides a much higher capacity and avoids fully closing the line for eight months. The second part of the Lötschberg axis is the Simplon Tunnel , completed in 1905 as a 20-kilometre-long (12 mi) single-track base tunnel and augmented with a second bore in 1921. It connects Upper Valais to Northern Italy 's Piedmont region. Double track A double-track railway usually involves running one track in each direction, compared to

1720-470: Is only partially completed. Because of NRLA cost overruns, funding for the axis was diverted to the Gotthard Base Tunnel and only one of the tunnel's two bores has been completed and is fully equipped for rail use. 14 kilometers of the other bore are completed; 14 kilometers are excavated but not equipped, and 7 kilometers have not been excavated. High-speed switches allow the completed 40% of

1806-515: Is quadruple tracked in most portions south of New Haven, but also has a few triple-track segments. The Metra Electric District is quadruple-tracked on most of the main line north of Kensington/115th Street station , with local trains running in the center two tracks, and express trains on the outer two tracks. Outside the United States the Chūō Main Line is an example of a modern, heavily utilized urban quadruple track railway. Quadruple track

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1892-461: Is the world's longest and deepest traffic tunnel , as was the original 15-kilometre (9.3 mi) Gotthard Tunnel at its completion in 1881. It consists of two parallel single-track tunnels, connected by 178 cross-connections. There are two emergency stations in each tunnel, each connected to the corresponding opposite-tunnel emergency station. These stations are equipped with water supplies to refill firefighter and rescue trains. One ( Porta Alpina )

1978-557: Is two separate lines operationally combined to act as a double-track line by converting each line to unidirectional traffic. An example is in central Nevada , where the Western Pacific and Southern Pacific Railroads , longtime rivals who each built and operated tracks between northern California and Utah , agreed to share their lines between meeting points near Winnemucca and Wells , a distance of approximately 180 miles (290 km). Westbound trains from both companies used

2064-602: Is used in rapid transit systems as well: throughout the New York City Subway , the Chicago "L" 's North Side Main Line , and SEPTA 's Broad Street Line in the United States, and on the London Underground in the United Kingdom. The two tracks of a double-track railway do not have to follow the same alignment if the terrain is difficult. At Frampton, New South Wales , Australia, the uphill track follows something of

2150-530: The Bernese Alps , was built by BLS Alp Transit. It supports the western transit network via Basel , Olten , Bern , Brig , Domodossola and Milan . The tunnel replaces the existing higher-altitude 1913 14.6-kilometre (9.1 mi) Lötschberg Tunnel for most traffic. The 34.6-kilometre-long (21.5 mi) base tunnel opened to traffic on 7 December 2007; it was the first part of the NRLA to be delivered, but

2236-681: The Boyne Viaduct , a bridge just north of Drogheda railway station in Ireland ). The bridge over the Murray River between Albury and Wodonga is double-track, but because of insufficient strength in the bridge only one train is allowed on it at a time. The bridge has since been singled as part of the North East Line Standardisation with the old broad gauge track now disconnected but remains in place on

2322-558: The Canadian National main line in the Greater Toronto Area and Southern Ontario are triple track to facilitate high traffic density of freight services, intercity , and suburban passenger trains sharing the same lines. India, through its state-owned Indian Railways, has initiated the construction of a third track between Jhansi and Nagpur via Bhopal (approximately 590 kilometres (370 miles)) for reducing

2408-686: The Ceneri Base Tunnel (CBT), and surface connections. It was built by AlpTransit Gotthard under contract from the Swiss Federal Government . The axis is the first flat trans-alpine rail link, with a maximum elevation of 550 metres (1,800 ft) above sea level. This enables a high-speed link through the Alps with a top speed of 250 km/h (160 mph), reducing travel time between Zürich and Milan from previously four hours to currently three-and-a-half hours. The 57.1-kilometre (35.5 mi) Gotthard Base Tunnel

2494-532: The EU ), Switzerland demanded a limitation on transalpine truck traffic. When the EEC refused, Swiss negotiators instead proposed a heavy-vehicle fee (HVF), a kilometre-based tax on freight vehicles, for all lorries above 3.5 tonnes and offered to build a high-speed rail link through the Alps for intermodal freight transport . Swiss voters approved the rail link in a 27 September 1992 mandatory referendum . The EU accepted

2580-631: The Earth's circumference . Work over the following year centered on the fitting-out process, installing all of the operational systems, including the track itself. In July 2006, track construction in the LBT was declared complete. Extensive testing then took place, including more than 1,000 test runs, which focused among other things on the use of the European Train Control System (ETCS) Level 2 system. Once satisfied that all systems had been validated, an official opening ceremony for

2666-524: The Gotthard Base Tunnel are the two centerpieces of the Swiss NRLA project. In 1994, early drilling was conducted in the area. During 1999, full-scale construction work on the LBT commenced. It was largely excavated using a combination of traditional techniques, including drilling and blasting. Roughly 80% of the tunnel was built using these conventional practices. The remaining 20% was excavated using tunnel boring machines (TBMs). The excavation work

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2752-584: The Hudson and New Haven Lines, both of which are shared between Metro-North and Amtrak in New York and Connecticut. The New Haven Line is quadruple track along its entire length, while the Hudson Line is only quadruple tracked along the shared portion from Riverdale to Croton–Harmon and along the shared track from Grand Central Terminal to Yankees–East 153rd Street . Amtrak 's Northeast Corridor

2838-672: The Main Western Railway between Wallerawang and Tarana , and between Gresham and Newbridge were singled in the 1990s. A new passing loop was opened on part of the closed track at Rydal in the Wallerawang–Tarana section during 2019. A double-track tunnel with restricted clearances is sometimes singled to form a single track tunnel with more generous clearances, such as the Connaught Tunnel in Canada or

2924-450: The signalling systems, especially where the signalling is mechanical (e.g. semaphore signals ). Where the signals and points (UK term) or rail switches (US) are power-operated, it can be worthwhile to provide signals for each line which cater for movement in either direction, so that the double line becomes a pair of single lines. This allows trains to use one track where the other track is out of service due to track maintenance work, or

3010-426: The 1880s, with full duplication completed around 1910. All bridges, tunnels, stations, and earthworks were built for double track. Stations with platforms with 11-foot (3.4 m) centres had to be widened later to 12-foot (3.7 m) centres, except for Gosford . The former Baltimore and Ohio Railroad (B&O) line between Baltimore and Jersey City , now owned by CSX and Conrail Shared Assets Operations ,

3096-479: The Alps ( NRLA ; German : Neue Eisenbahn-Alpentransversale, NEAT , French : nouvelle ligne ferroviaire à travers les Alpes, NLFA , Italian : Nuova ferrovia transalpina, NFTA ), is a Swiss construction project for faster north–south rail links across the Swiss Alps . It consists of two axes with several improvements along these rails including three new base tunnels several hundred metres below

3182-407: The Alps by road. Meeting this goal requires a fully functional NRLA rail link. The original plans for the NRLA were to construct only one main base tunnel, but regional disputes prevented a choice between the two options and threatened to jeopardize the entire project. The Swiss Federal Council therefore decided in 1995 to build two base tunnels (Gotthard and Lötschberg) simultaneously. In 1998,

3268-622: The LBT allows a substantial number of trucks and trailers to be loaded onto trains in Germany, pass through Switzerland on rail and be unloaded in Italy ( rolling highway or trailer-on-flatcar respectively). It also cuts down travel time for German tourists going to Swiss ski resorts, and puts the Valais into commuting distance to Bern by reducing travel time by 50%. The total cost was SFr 4.3 billion (as of 2007, corrected to 1998 prices). This and

3354-483: The LBT shall be modified accordingly. On 27 April 2020, it was announced that the LBT had been fully reopened. Warm groundwater continuously drains from the LBT. The warmth of this water flowing out of the tunnel is used to heat the Tropenhaus Frutigen , a tropical greenhouse producing exotic fruit, sturgeon meat and caviar . Download coordinates as: NRLA The New Railway Link through

3440-501: The LBT was held during June 2007; at this event, the tunnel was recognised as the longest land tunnel anywhere in the world. The LBT overran its budget of roughly $ 2.7 billion by around $ 840 million, which has impacted its operation. On 9 December 2007, the LBT was declared operational. Initially, only regular freight services traversed the LBT, along with a minority of international and InterCity passenger trains (without stops between Spiez and Brig); passenger trains continued to operate on

3526-510: The NRLA was completed. The condition was deemed fulfilled at the completion of the first track of the Lötschberg Base Tunnel in 2007. Other relevant Swiss legislation includes the 1994 Alps initiative , which prohibits road-building in the Alps and encourages the transport of as many transalpine goods as possible by rail rather than road, and the 1998 Traffic Transfer Act, which sets an ideal maximum number of trucks crossing

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3612-734: The Southern Pacific's Overland Route , and eastbound trains used the Western Pacific's Feather River Route (now called the Central Corridor ). Crossovers were constructed where the lines ran in close proximity to allow reverse movements. This was necessary as while for most of this run the tracks straddle opposite sides of the Humboldt River , at points the two tracks are several miles apart and some destinations and branch lines can only be accessed from one of

3698-620: The Swiss Confederation. The bilateral agreements with the EU containing the 40-tonne limit and the implementation of the HVF were finally accepted by the Swiss populace on 21 May 2000 with 67.2% support in a federal optional referendum initiated by opposing political parties. The Gotthard axis consists of the Gotthard Base Tunnel (GBT), the partially operational Zimmerberg Base Tunnel ,

3784-490: The Swiss offer in 2000, but requested that the extant 28-tonne weight limit for lorries be raised to 48 tonnes. The parties eventually compromised on a 40-tonne weight limit. The bilateral Land Transport Agreement with the European Union was signed, agreeing to an increase of the kilometer-based tax (HVF; German : LSVA , French : RPLP , Italian : TTPCP ) on HGVs from 1.6 ct/tkm to 1.8 ct/tkm when

3870-551: The Tickhole Tunnel in New South Wales , Australia. In the case of the Tickhole Tunnel a new single-track tunnel was built and the two tracks in the original tunnel were replaced by one track in the centreline of the tunnel. Another case where this was necessary was the Hastings Line in the United Kingdom, where the tunnels were eventually singled to permit the passage of standard British-gauge rolling stock. Before

3956-588: The bridge. Railways that become especially busy in wartime and are duplicated, especially in World War I, may revert to single track when peace returns and the extra capacity is no longer required. The Flanders campaign saw duplication of the Hazebrouck – Ypres line, amongst other works. Severe gradients can make the headway in the uphill direction much worse than the headway in the downhill direction. Between Whittingham and Maitland, New South Wales ,

4042-528: The broad gauge declined, the lines were converted to bi-directional double track 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) gauge lines. Quadruple track consists of four parallel tracks. On a quad-track line, faster trains can overtake slower ones. Quadruple track is mostly used when there are "local" trains that stop often (or slow freight trains), and also faster inter-city or high-speed "express" trains. It can also be used in commuter rail or rapid transit . The layout can vary, often with

4128-535: The choice of which side the driver should sit is less important. For example, the French SNCF Class BB 7200 is designed to use the left-hand track and therefore uses LHD. When the design was modified for use in the Netherlands as NS Class 1600 , the driving cab was not completely redesigned, keeping the driver on the left even though trains use the right-hand track in the Netherlands. Generally,

4214-400: The classic lines of the former German Alsace and Lorraine), Sweden (apart from Malmö and further south), Switzerland, Italy and Portugal for example, the railways use left-hand running, while the roads use right-hand running. However, there are many exceptions: Handedness of traffic can affect locomotive design. For the driver, visibility is usually good from both sides of the driving cab, so

4300-498: The different tracks is called the "six foot". It is not safe to stand in the gap between the tracks when trains pass by on both lines, as happened in the Bere Ferrers accident of 1917. When one track of a double-track railway is out of service for maintenance or a train breaks down, all trains may be concentrated on the one usable track. There may be bi-directional signalling and suitable crossovers to enable trains to move onto

4386-525: The earliest days of railways in the United States most lines were built as single-track for reasons of cost, and very inefficient timetable working systems were used to prevent head-on collisions on single lines. This improved with the development of the telegraph and the train order system. In any given country, rail traffic generally runs to one side of a double-track line, not always the same side as road traffic. Thus in Belgium, China, France (apart from

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4472-410: The existing apex tunnels, the 57-kilometre (35 mi) Gotthard Base Tunnel , the 35-kilometre (22 mi) Lötschberg Base Tunnel , and the 15-kilometre (9.3 mi) Ceneri Base Tunnel . Swiss Federal Railways subsidiary AlpTransit Gotthard AG and BLS AG subsidiary BLS Alp Transit AG (now BLS Netz AG) were founded for this project and built the tunnels. The total projected cost of the project

4558-452: The freight traffic it carries. The 21 kilometres (13 mi) of single track, which lack passing loops , greatly complicates operations. Despite its relatively recent completion date, the LBT has already become a major bottleneck for rail freight traversing the Alps. Typically, trains using the LBT are scheduled together in batches that run in each direction separated by long intervals; trains more than seven minutes late are either routed via

4644-435: The initiative, and their not even considering providing a counterproposal to the populace. Another mandatory referendum was held on 19 November 1998 about the creation of funds for four major public-transport projects ( German : FinöV-Fonds , French : Fonds FTP , Italian : Fondo FTP ), funding them with time-limited CHF 30 billion fund of which the NRLA would receive 13.6 billion. Another major project

4730-517: The left/right principle in a country is followed mostly on double track. On steam trains, the steam boiler often obscured some of the view, so the driver was preferably placed nearest to the side of the railway, so that it was easier to see the signals. On single track, when trains meet, the train that does not stop often uses the straight path in the turnout, which can be left or right. Double-track railways, especially older ones, may use each track exclusively in one direction. This arrangement simplifies

4816-490: The length and width of trains is contingent on the minimum railway curve radius of the railway. Increasing the width of track centres of 6 metres (20 ft) or more makes it much easier to mount signals and overhead wiring structures. Very widely spaced centres at major bridges can have military value. It also makes it harder for rogue ships and barges to knock out both bridges in the same accident. Railway lines in desert areas affected by sand dunes are sometimes built with

4902-423: The lines. There is a grade separated crossover of the two lines in the shared track area near Palisade, Nevada , which results in trains following right hand traffic in the eastern half of the shared track area, but left hand traffic in the western half. The Union Pacific Railroad has since acquired both of these lines, and continues to operate them as separate lines using directional running. Amtrak also runs

4988-539: The local train stations, the express trains can pass through the station at full speed. For example on the Nuremberg-Bamberg railway , which is quadruple track for most of its course, the inner two tracks are used by the S-Bahn Nuremberg whereas the outer tracks are used for regional express and Intercity Express trains. The section in northern Fürth where the line is "only" double track creates

5074-560: The loop with close time tolerances, otherwise they will need to slow or even be brought to a complete stop to allow the oncoming train to pass. They are suited to lines with light to moderate traffic. An example of where passing lanes have been installed in order to improve travel times and increase line capacity is the 160-kilometre (100-mile) section of the Main Southern railway line in Australia between Junee and Albury . This

5160-518: The old line or must wait for the next available timetable slot in their direction in the LBT, incurring long further delays in either case. By 2019, around 110 trains per day were using the LBT, while a further 66 have continued to use the old mountain tunnel largely due to the base tunnel's current capacity constraints. Of these 110, 30 were passenger services and 80 were hauling various types of freight, including intermodal freight transport and long-distance heavy freight trains. Heavy freight trains up to

5246-418: The old timetable (the travel time between Spiez and Brig was considered to be 56 minutes until December 2007, even if actual travel time through the LBT was only about 30 minutes). Since February 2008, the LBT has been routinely used for normal InterCity routes. Travel time between Visp and Spiez is about 28 minutes, of which 16 minutes is spent inside the LBT. As a consequence of spiraling costs attributable to

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5332-666: The other track expeditiously (such as the Channel Tunnel ), or there may be some kind of manual safeworking to control trains on what is now a section of single track. See single-line working . Accidents can occur if the temporary safeworking system is not implemented properly, as in: From time to time, railways are asked to transport exceptional loads such as massive electrical transformers that are too tall, too wide or too heavy to operate normally. Special measures must be carefully taken to plan successful and safe operation of out-of-gauge trains . For example, adjacent tracks of

5418-442: The outer tracks use bi-directional running and serve local trains exclusively in one direction. During service disruptions on one of the two outer tracks, trains could also bypass the affected sections on the center track. The Union Pacific Railroad mainline through Nebraska has a 108-mile (174 km) stretch of triple track between North Platte and Gibbon Junction, due to a high traffic density of 150 trains per day. Portions of

5504-455: The overall NRLA project, it was decided to redirect funds from the Lötschberg tunnel to the Gotthard Base Tunnel . This funding decision leaves the LBT in a partially-completed state for a protracted period. Once fully complete, the LBT will consist of two single track bores side by side from portal to portal, connected about every 300 m (980 ft) with cross cuts, enabling the other tunnel to be used for escape. The construction process

5590-727: The partial reinstatement of double track. In New Zealand the Melling Line was singled to the Western Hutt Railway Station in Lower Hutt in 1958 after it became a branch line rather than part of the main Hutt Valley Line . Kirkby railway station (until 1977) and Ormskirk railway station (until 1970) were double-track railway, when they were converted into single-track railway with cross-platform interchange . In New South Wales, Australia,

5676-411: The rapid growth of passenger and freight traffic with the presence of a single track section, which severely limits its overall capacity; it views the implementation of double-track running as being "absolutely essential". Operation of the LBT allegedly has an impact on the timetable reliability and flexibility across the entire Swiss rail network, as well as facilitating a reduction in production costs via

5762-408: The second bore to be used as a passing track, but the 21 kilometres (13 mi) of single track without passing loops complicates operations and greatly reduces the line capacity. Trains are scheduled by batches in each direction and separated by long intervals; trains more than seven minutes late are routed via the old line or must wait for the next available timetable slot in their direction in

5848-556: The singling, narrow-bodied stock, specially constructed for the line, had to be used. As part of the Regional Fast Rail project in Victoria, Australia , the rail line between Kyneton and Bendigo was converted from double- to single-track to provide additional clearance through tunnels and under bridges for trains travelling at up to 160 km/h (99 mph). A similar process can be followed on narrow bridges (like

5934-526: The total projected cost of the NRLA project was CHF 12.189 billion; in December 2015, the final cost was projected to be CHF 17.900 billion. The projected cost of its centerpiece, the Gotthard Base Tunnel, was CHF 6.323  billion in 1998; in December 2015, the tunnel's cost was an estimated CHF 9.560 billion. The 1998 cost of the Lötschberg axis was an estimated CHF 3.214 billion; in December 2015, it

6020-626: The tracks' centres makes a difference in cost and performance of a double-track line. The track centres can be as closely spaced and as cheap as possible, but maintenance must be done on the side. Signals for bi-directional working cannot be mounted between the tracks, so they must be mounted on the 'wrong' side of the line or on expensive signal bridges . For standard gauge tracks the distance may be 4 metres (13 ft) or less. Track centres are usually further apart on high speed lines, as pressure waves knock each other as high-speed trains pass. Track centres are also usually further apart on sharp curves, and

6106-400: The traffic load and delays in passenger train arrivals. The construction between Bina and Bhopal and between Itarsi and Budhni had been completed by April 2020. The Melbourne to Albury railway originally consisted of separate 1,600 mm ( 5 ft 3 in ) gauge and 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) gauge single track lines, but when traffic on

6192-523: The tunnel interior, removing the sand and excess water via suction , and the flushing out of its drainage system, temporary steel tanks have been installed in the bore with regular inspections of the tunnel with a particular focus on this issue. Furthermore, solutions to prevent reoccurrence in the long term have been identified and are to be compiled into a plan for approval by the Federal Office for Transport during late 2020; if approved, sections of

6278-517: The tunnel, causing major further delays. A planning contract for the completion of the second track of the LBT was awarded in 2016. The resulting plan was presented in Spring 2019, with options of either only fitting out the existing 14 km of unequipped tunnels or fully completing the second tube. In early-2024 the choice was made to go for the full option, with an estimated cost of CHF 1.7 billion and an expected delivery date of 2033. It

6364-419: The two outer tracks carrying the local trains that stop at every station so one side of stations can be reached without staircase; this can also be reversed, with express trains on the outside and locals on the inside, for example if staffed ticket booths are wanted, allowing one person for both directions. At other places two tracks on one half of the railway carry local trains and the other half faster trains. At

6450-489: The two tracks are at different levels, with the original southbound and downhill track following ground level with a steep gradient, while the newer northbound and uphill track has a gentler gradient at the cost of more cut and fill . At the Bethungra Spiral , Australia, the downhill track follows the original short and steep alignment, while the uphill track follows a longer, more easily graded alignment including

6536-469: The two tracks are separated by a wall). A planning contract for phases two and three was awarded in 2016 to the Swiss engineering consortium IG Valbt , headed by SRP Ingenieur . The resulting plan was presented for review in early 2019, and a decision between funding only phase two or both phase two and three was initially expected in 2023. The first option would naturally have been cheaper and would have taken two years less to build, but it would have provided

6622-404: The two tracks separated, so that if one is covered by sand, the other(s) are still serviceable. If the standard track centre is changed, it can take a very long time for most or all tracks to be brought into line. On British lines, the space between the two running rails of a single railway track is called the "four foot" (owing to it being 'four foot something' in width), while the space between

6708-411: Was CHF  12.189 billion at its 1998 start; in December 2015, its final cost was projected to be CHF 17.900 billion. The 1998 projected total cost of the Gotthard Base Tunnel was CHF 6.323 billion; in December 2015, its final cost was projected to be CHF 9.560 billion. It opened on 1 June 2016, and became operational on 11 December of that year. The Ceneri Base Tunnel

6794-498: Was an estimated CHF 4.237 billion. Swiss voters approved the NRLA project on 27 September 1992, with 63.6% support. Two years later on 20 February 1994, the Swiss populace unexpectedly also accepted with 51.9% support the Alps protecting initiative, a federal popular initiative initiated by just a few private citizens. This was despite neither the Federal Council nor the two parliamentary chambers endorsing

6880-410: Was built as a single track line in stages between 1878 and 1881, and was partially duplicated between 2005 and 2010 by the construction of four passing lanes each 6 km (4 mi) long. In this instance, this was accomplished by extending pre-existing crossing loops of either 900 metres (3,000 ft) or 1,500 metres (4,900 ft) in length. The process of expanding a single track to double track

6966-415: Was conducted from both the north and south portals. During April 2005, the construction process reached a milestone when breakthrough was achieved; the event was attended by 1,000 guests. The excavation process reportedly used 15 thousand kilograms (16 short tons) of explosives, while the material extracted would have filled a freight train that was 4,000 kilometres (2,500 mi) in length – one-tenth of

7052-401: Was divided into three phases, of which only phase one has been completed to date: Currently, from South to North, 40% of the tunnel is therefore double track , 40% is single track with the second bore in place but not equipped, and 20% is only a single track tunnel with the parallel exploration adit providing the emergency egress. This unused western bore has been used by maintenance crews as

7138-605: Was opened on 3 September 2020 and became fully operational in December 2020 and is an important feeder for the Gotthard Base Tunnel. A decision to fully complete the second tube of the Lötschberg Base Tunnel was made in early-2024, with an estimated cost of CHF 1.7 billion and construction expected to extend from 2026 to 2033. During late-1980s and early-1990s negotiations with the European Economic Community (the predecessor of

7224-477: Was principally constructed to ease lorry traffic on the Swiss road network by providing faster routes for rail-based freight as an alternative. Reportedly, between the 1980s and 2000s, traffic on the north-south European axis (North Sea Ports to/from Northern Italy and along the Blue Banana ) had increased more than tenfold, necessitating infrastructure investments to better cope with rising demands. Accordingly,

7310-429: Was proposed as an 800m deep rail station, but that proposal was rejected on both economic and technical grounds. AlpTransit Gotthard handed the completed tunnel over to the Swiss government on 31 May 2016. It was formally opened in a ceremony the next day, during which the tunnel was conveyed to its operator: Swiss Federal Railways (SBB CFF FFS). The Lötschberg axis, with the Lötschberg Base Tunnel (LBT) in

7396-499: Was the Bahn 2000 project regarding the modernization of the railways. The Federal Council's request was approved with 63.5% support. The fund is replenished primarily by the previously mentioned kilometre-based tax on heavy-goods vehicles (HVF) and partially by taxes on gasoline originally intended for road-building, a small fraction of the VAT revenues, and funds from the general budget of

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