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94-995: The Port Washington Branch is an electrified , mostly double-tracked rail line and service owned and operated by the Long Island Rail Road in the U.S. state of New York . It branches north from the Main Line at the former Winfield Junction station, just east of the Woodside station in the New York City borough of Queens , and runs roughly parallel to Northern Boulevard past Mets-Willets Point ( Citi Field ), Flushing , Murray Hill , Broadway , Auburndale , Bayside , Douglaston , Little Neck , and then crosses into Nassau County for stops in Great Neck , Manhasset , and Plandome before terminating at Port Washington . The Port Washington Branch

188-624: A contract was given to the Carnegie Steel Company and a subsidiary, the King Iron Company, undertook the job of constructing the bridge." The trestle bridge cost about $ 60,000, and the first train to cross it was on June 23, 1898. The GN&PW was disestablished as a subsidiary in 1902, and that segment simply became part of the Port Washington Branch. Two other early 20th-century stations built on

282-696: A few morning express trains run nonstop between Great Neck and Penn Station). Extra service is offered during the U.S. Open tennis tournament and for New York Mets home games, both of which are held in Flushing Meadows–Corona Park . These trains primarily pick up and discharge passengers at the Mets–Willets Point station between Woodside and Flushing Main Street ; formerly a station used exclusively for events, Mets–Willets Point has been open full-time since April 2023. The route also runs over

376-573: A higher total efficiency. Electricity for electric rail systems can also come from renewable energy , nuclear power , or other low-carbon sources, which do not emit pollution or emissions. Electric locomotives may easily be constructed with greater power output than most diesel locomotives. For passenger operation it is possible to provide enough power with diesel engines (see e.g. ' ICE TD ') but, at higher speeds, this proves costly and impractical. Therefore, almost all high speed trains are electric. The high power of electric locomotives also gives them

470-467: A historical concern for double-stack rail transport regarding clearances with overhead lines but it is no longer universally true as of 2022 , with both Indian Railways and China Railway regularly operating electric double-stack cargo trains under overhead lines. Railway electrification has constantly increased in the past decades, and as of 2022, electrified tracks account for nearly one-third of total tracks globally. Railway electrification

564-475: A line from Long Island City to Flushing and beyond to Roslyn , with a branch from Flushing to Whitestone . The group gained control of the unfinished Flushing and Woodside Railroad , and opened its line to Flushing, paralleling the LIRR from Long Island City to Woodside, in 1868 and to College Point and Whitestone in 1869. This new line attracted most of the traffic from the older New York and Flushing, and

658-537: A number of European countries, India, Saudi Arabia, eastern Japan, countries that used to be part of the Soviet Union, on high-speed lines in much of Western Europe (including countries that still run conventional railways under DC but not in countries using 16.7   Hz, see above). Most systems like this operate at 25   kV, although 12.5   kV sections exist in the United States, and 20   kV

752-457: A power grid that is delivered to a locomotive, and within the locomotive, transformed and rectified to a lower DC voltage in preparation for use by traction motors. These motors may either be DC motors which directly use the DC or they may be three-phase AC motors which require further conversion of the DC to variable frequency three-phase AC (using power electronics). Thus both systems are faced with

846-498: A relative lack of flexibility (since electric trains need third rails or overhead wires), and a vulnerability to power interruptions. Electro-diesel locomotives and electro-diesel multiple units mitigate these problems somewhat as they are capable of running on diesel power during an outage or on non-electrified routes. Different regions may use different supply voltages and frequencies, complicating through service and requiring greater complexity of locomotive power. There used to be

940-481: A separate fourth rail for this purpose. In comparison to the principal alternative, the diesel engine , electric railways offer substantially better energy efficiency , lower emissions , and lower operating costs. Electric locomotives are also usually quieter, more powerful, and more responsive and reliable than diesel. They have no local emissions, an important advantage in tunnels and urban areas. Some electric traction systems provide regenerative braking that turns

1034-418: A third rail. The key advantage of the four-rail system is that neither running rail carries any current. This scheme was introduced because of the problems of return currents, intended to be carried by the earthed (grounded) running rail, flowing through the iron tunnel linings instead. This can cause electrolytic damage and even arcing if the tunnel segments are not electrically bonded together. The problem

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1128-580: A total cost of $ 45.2 million. However, the completion date was pushed back several times; construction of the extended pocket track would ultimately be completed in December 2022. Alongside this project, a new bridge was built at Colonial Road near Great Neck station; it opened in May 2016 and replaced a 114-year-old span. The second of the two readiness projects is the expansion of Port Washington Yard, next to Port Washington station. As of 2017, construction

1222-411: Is derived by using resistors which ensures that stray earth currents are kept to manageable levels. Power-only rails can be mounted on strongly insulating ceramic chairs to minimise current leak, but this is not possible for running rails, which have to be seated on stronger metal chairs to carry the weight of trains. However, elastomeric rubber pads placed between the rails and chairs can now solve part of

1316-451: Is effected by one contact shoe each that slide on top of each one of the running rails . This and all other rubber-tyred metros that have a 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) standard gauge track between the roll ways operate in the same manner. Railways and electrical utilities use AC as opposed to DC for the same reason: to use transformers , which require AC, to produce higher voltages. The higher

1410-526: Is electrified, companies often find that they need to continue use of diesel trains even if sections are electrified. The increasing demand for container traffic, which is more efficient when utilizing the double-stack car , also has network effect issues with existing electrifications due to insufficient clearance of overhead electrical lines for these trains, but electrification can be built or modified to have sufficient clearance, at additional cost. A problem specifically related to electrified lines are gaps in

1504-486: Is limited and losses are significantly higher. However, the higher voltages used in many AC electrification systems reduce transmission losses over longer distances, allowing for fewer substations or more powerful locomotives to be used. Also, the energy used to blow air to cool transformers, power electronics (including rectifiers), and other conversion hardware must be accounted for. Standard AC electrification systems use much higher voltages than standard DC systems. One of

1598-778: Is no longer exactly one-third of the grid frequency. This solved overheating problems with the rotary converters used to generate some of this power from the grid supply. In the US , the New York, New Haven, and Hartford Railroad , the Pennsylvania Railroad and the Philadelphia and Reading Railway adopted 11   kV 25   Hz single-phase AC. Parts of the original electrified network still operate at 25   Hz, with voltage boosted to 12   kV, while others were converted to 12.5 or 25   kV 60   Hz. In

1692-447: Is sufficient traffic, the reduced track and especially the lower engine maintenance and running costs exceed the costs of this maintenance significantly. Newly electrified lines often show a "sparks effect", whereby electrification in passenger rail systems leads to significant jumps in patronage / revenue. The reasons may include electric trains being seen as more modern and attractive to ride, faster, quieter and smoother service, and

1786-436: Is supplied to moving trains with a (nearly) continuous conductor running along the track that usually takes one of two forms: an overhead line , suspended from poles or towers along the track or from structure or tunnel ceilings, or a third rail mounted at track level and contacted by a sliding " pickup shoe ". Both overhead wire and third-rail systems usually use the running rails as the return conductor, but some systems use

1880-410: Is that the power-wasting resistors used in DC locomotives for speed control were not needed in an AC locomotive: multiple taps on the transformer can supply a range of voltages. Separate low-voltage transformer windings supply lighting and the motors driving auxiliary machinery. More recently, the development of very high power semiconductors has caused the classic DC motor to be largely replaced with

1974-894: Is the countrywide system. 3   kV DC is used in Belgium, Italy, Spain, Poland, Slovakia, Slovenia, South Africa, Chile, the northern portion of the Czech Republic, the former republics of the Soviet Union , and in the Netherlands on a few kilometers between Maastricht and Belgium. It was formerly used by the Milwaukee Road from Harlowton, Montana , to Seattle, across the Continental Divide and including extensive branch and loop lines in Montana, and by

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2068-580: Is the development of powering trains and locomotives using electricity instead of diesel or steam power . The history of railway electrification dates back to the late 19th century when the first electric tramways were introduced in cities like Berlin , London , and New York City . In 1881, the first permanent railway electrification in the world was the Gross-Lichterfelde Tramway in Berlin , Germany. Overhead line electrification

2162-654: Is the only LIRR branch to not serve Jamaica , a major LIRR transportation hub, as it branches off the Main Line at Winfield Junction, several miles northwest of Jamaica. Thus, passengers seeking to switch to other LIRR services without going into Manhattan must instead transfer at Woodside station. The line has two tracks from Woodside to Great Neck and one track from east of Great Neck past Manhasset and Plandome stations to Port Washington. This often causes slight delays to one train to spread to other trains. A second track cannot be added through Manhasset and Plandome due to

2256-649: Is the use of electric power for the propulsion of rail transport . Electric railways use either electric locomotives (hauling passengers or freight in separate cars), electric multiple units ( passenger cars with their own motors) or both. Electricity is typically generated in large and relatively efficient generating stations , transmitted to the railway network and distributed to the trains. Some electric railways have their own dedicated generating stations and transmission lines , but most purchase power from an electric utility . The railway usually provides its own distribution lines, switches, and transformers . Power

2350-838: Is used on some narrow-gauge lines in Japan. On "French system" HSLs, the overhead line and a "sleeper" feeder line each carry 25   kV in relation to the rails, but in opposite phase so they are at 50   kV from each other; autotransformers equalize the tension at regular intervals. Various railway electrification systems in the late nineteenth and twentieth centuries utilised three-phase , rather than single-phase electric power delivery due to ease of design of both power supply and locomotives. These systems could either use standard network frequency and three power cables, or reduced frequency, which allowed for return-phase line to be third rail, rather than an additional overhead wire. The majority of modern electrification systems take AC energy from

2444-656: The Delaware, Lackawanna and Western Railroad (now New Jersey Transit , converted to 25   kV   AC) in the United States, and the Kolkata suburban railway (Bardhaman Main Line) in India, before it was converted to 25   kV 50   Hz. DC voltages between 600   V and 750   V are used by most tramways and trolleybus networks, as well as some metro systems as the traction motors accept this voltage without

2538-742: The Flushing River , there was a junction leading either toward the main line of the F&;NS railroad or the Whitestone Branch . Despite service complaints, New York and Flushing established a subsidiary called the North Shore Railroad of Long Island on September 25, 1863 to extend the line from Flushing to Great Neck . The extension opened on October 27, 1866. Unfortunately, the NY&;F realized that they could not survive

2632-711: The HSL-Zuid and Betuwelijn , and 3,000   V south of Maastricht . In Portugal, it is used in the Cascais Line and in Denmark on the suburban S-train system (1650   V DC). In the United Kingdom, 1,500   V   DC was used in 1954 for the Woodhead trans-Pennine route (now closed); the system used regenerative braking , allowing for transfer of energy between climbing and descending trains on

2726-701: The Innovia ART system. While part of the SkyTrain network, the Canada Line does not use this system and instead uses more traditional motors attached to the wheels and third-rail electrification. A few lines of the Paris Métro in France operate on a four-rail power system. The trains move on rubber tyres which roll on a pair of narrow roll ways made of steel and, in some places, of concrete . Since

2820-428: The New York and Flushing Railroad , and established a subsidiary known as the "North Shore Railroad" to extend the line from Flushing to Great Neck in 1866 (see below). Originally intending to run further east to Roslyn , Oyster Bay , and even Huntington , the NY&F's plans were thwarted by the LIRR who reached those destination first, as well as poor service that the company became known for. Dissatisfied with

2914-684: The South Side Railroad 's access to Long Island City. The segment between what was to become the former Laurel Hill and Winfield Junction stations was abandoned for passenger service in 1875, and completely abandoned in 1880. Part of the right-of-way ran through what is today the Mount Zion Jewish Cemetery in Maspeth . The Flushing and Woodside was merged into the Flushing and North Side in 1871, and its line

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3008-636: The Southern Railway serving Coulsdon North and Sutton railway station . The lines were electrified at 6.7   kV 25   Hz. It was announced in 1926 that all lines were to be converted to DC third rail and the last overhead-powered electric service ran in September 1929. AC power is used at 60   Hz in North America (excluding the aforementioned 25   Hz network), western Japan, South Korea and Taiwan; and at 50   Hz in

3102-461: The United States , the New York, New Haven and Hartford Railroad was one of the first major railways to be electrified. Railway electrification continued to expand throughout the 20th century, with technological improvements and the development of high-speed trains and commuters . Today, many countries have extensive electrified railway networks with 375 000  km of standard lines in

3196-518: The Flushing and North Side Railroad, he also acquired the Flushing and Woodside, but was able to complete construction of the line, which became the Woodside Branch of the Flushing and North Side. The line only contained one other station at Junction Boulevard and 35th Avenue called Grinnell station. This station opened on April 24, 1874 and closed in October 1877. East of Grinnell station and

3290-689: The Flushing and North Side Railroad, including the Main Line to Great Neck were incorporated into the Flushing, North Shore and Central Railroad , which included the Central Railroad of Long Island . Two years later, it would become part of the Long Island Rail Road, which closed the line east of Flushing in 1881 and reopened it a year later as subsidiary known as the Long Island City and Flushing Railroad . The LIC&F

3384-429: The Flushing and North Side, most of the line was originally built by the New York and Flushing Railroad (NY&F) , in 1854 from Hunters Point in Long Island City to Flushing , before the LIRR opened its line to Long Island City. Chartered on March 3, 1852, it was the first railroad on Long Island not to be part of the Long Island Rail Road. The company was taken over by Oliver Charlick and reorganized in 1859 as

3478-588: The LIRR wanted to get rid of its Flushing branch. In 1869, an affiliate of the Flushing and North Side, the Whitestone and Westchester Railroad , built the Whitestone Branch . It was intended to cross the East River to Westchester County , but never had the chance to do so. The line had a spur to a freight dock on Flushing Bay which crossed the Woodside Branch and the connecting line between

3572-649: The LIRR would study expanding the yard. At the North Hempstead Town Hall meeting that evening (where the MOU was unanimously approved), Assemblywoman Mariann Dalimonte stated in response to a question from a member of the public that she and Supervisor DeSena had expressed the concern as to whether or not there would be any service improvements from this project to the Metropolitan Transportation Authority, which oversees

3666-450: The LIRR. Dalimonte said they asked the MTA to ensure that services would be expanded if the project is completed, but the MTA said they could not guarantee it. West of Woodside , all trips go on to terminate at Penn Station or Grand Central . [REDACTED] Media related to Port Washington Branch ( category ) at Wikimedia Commons Electrified (rail) Railway electrification

3760-638: The Manhasset Viaduct, a high train trestle over the marshes at the southern end of Manhasset Bay. The bridge stands 81 feet (25 m) tall and runs 678 feet (207 m) across the bay, offering a view of the Manhasset Bay. Scenes from the Hearst -produced silent film serial " The Perils of Pauline " are said to have been shot on the trestle. There is only one grade crossing on the Port Washington Branch, located at Little Neck Parkway , at

3854-513: The NY&F's service, residents of Flushing and Newtown convinced the LIRR to incorporate the Flushing and Woodside Railroad on February 24, 1864 as a competing branch to Flushing. The branch ran from Woodside toward Great Neck Junction, with a branch to Whitestone. When the NY&F collapsed after construction of the Great Neck Extension, the LIRR acquired the railroad and left this branch unfinished. After Poppenhausen created

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3948-717: The Netherlands, New Zealand ( Wellington ), Singapore (on the North East MRT line ), the United States ( Chicago area on the Metra Electric district and the South Shore Line interurban line and Link light rail in Seattle , Washington). In Slovakia, there are two narrow-gauge lines in the High Tatras (one a cog railway ). In the Netherlands it is used on the main system, alongside 25   kV on

4042-479: The New York and Flushing east of the LIRR crossing at Winfield Station , while the segment between Hunters Point and Winfield was acquired by the South Side Railroad of Long Island until it was abandoned for passenger service east of what was to become the former Laurel Hill Station in 1875. Part of the right-of-way ran through what is today the Mount Zion Jewish Cemetery in Maspeth . By 1874, all branches of

4136-635: The Port Washington Branch were in Auburndale (1901) and Plandome (1909). The branch was electrified from the main line to Winfield Junction by June 23, 1910, to Whitestone Junction onto the Whitestone Branch to Whitestone Landing Station by October 22, 1912, and to its terminus in Port Washington by October 21, 1913. In 1910, the Public Service Commission approved the LIRR's application to eliminate grade crossings along

4230-696: The UK, the London, Brighton and South Coast Railway pioneered overhead electrification of its suburban lines in London, London Bridge to Victoria being opened to traffic on 1   December 1909. Victoria to Crystal Palace via Balham and West Norwood opened in May 1911. Peckham Rye to West Norwood opened in June 1912. Further extensions were not made owing to the First World War. Two lines opened in 1925 under

4324-675: The Woodside and Whitestone Branches. After the Flushing Bay Freight spur, the line itself also crossed the Woodside Branch, and then merged with the Woodside-Whitestone connector before crossing the Flushing River . From there it contained four stations, one at Bridge Street , College Point , and two in Whitestone , one at 14th Avenue and the other at 155th Street, which has been called Whitestone Landing station , and Beechhurst Yacht Club station . Malba station

4418-494: The ability to pull freight at higher speed over gradients; in mixed traffic conditions this increases capacity when the time between trains can be decreased. The higher power of electric locomotives and an electrification can also be a cheaper alternative to a new and less steep railway if train weights are to be increased on a system. On the other hand, electrification may not be suitable for lines with low frequency of traffic, because lower running cost of trains may be outweighed by

4512-516: The advantages of raising the voltage is that, to transmit certain level of power, lower current is necessary ( P = V × I ). Lowering the current reduces the ohmic losses and allows for less bulky, lighter overhead line equipment and more spacing between traction substations, while maintaining power capacity of the system. On the other hand, the higher voltage requires larger isolation gaps, requiring some elements of infrastructure to be larger. The standard-frequency AC system may introduce imbalance to

4606-480: The competition, and sold their line (and their lease on the North Shore Railroad of Long Island. ) to the LIRR in 1867. The LIRR benefitted by preventing the South Side Railroad from using the New York and Flushing access to the LIRR's Long Island City terminal, and by keeping the North Side Railroad from extending east to Huntington in competition with the LIRR. The LIRR also stopped construction on

4700-410: The distance they could transmit power. However, in the early 20th century, alternating current (AC) power systems were developed, which allowed for more efficient power transmission over longer distances. In the 1920s and 1930s, many countries worldwide began to electrify their railways. In Europe, Switzerland , Sweden , France , and Italy were among the early adopters of railway electrification. In

4794-448: The electrification. Electric vehicles, especially locomotives, lose power when traversing gaps in the supply, such as phase change gaps in overhead systems, and gaps over points in third rail systems. These become a nuisance if the locomotive stops with its collector on a dead gap, in which case there is no power to restart. This is less of a problem in trains consisting of two or more multiple units coupled together, since in that case if

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4888-404: The end of funding. Most electrification systems use overhead wires, but third rail is an option up to 1,500   V. Third rail systems almost exclusively use DC distribution. The use of AC is usually not feasible due to the dimensions of a third rail being physically very large compared with the skin depth that AC penetrates to 0.3 millimetres or 0.012 inches in a steel rail. This effect makes

4982-591: The experiment was curtailed. In 1970 the Ural Electromechanical Institute of Railway Engineers carried out calculations for railway electrification at 12 kV DC , showing that the equivalent loss levels for a 25 kV AC system could be achieved with DC voltage between 11 and 16   kV. In the 1980s and 1990s 12 kV DC was being tested on the October Railway near Leningrad (now Petersburg ). The experiments ended in 1995 due to

5076-500: The fact that electrification often goes hand in hand with a general infrastructure and rolling stock overhaul / replacement, which leads to better service quality (in a way that theoretically could also be achieved by doing similar upgrades yet without electrification). Whatever the causes of the sparks effect, it is well established for numerous routes that have electrified over decades. This also applies when bus routes with diesel buses are replaced by trolleybuses. The overhead wires make

5170-1012: The general power grid. This is especially useful in mountainous areas where heavily loaded trains must descend long grades. Central station electricity can often be generated with higher efficiency than a mobile engine/generator. While the efficiency of power plant generation and diesel locomotive generation are roughly the same in the nominal regime, diesel motors decrease in efficiency in non-nominal regimes at low power while if an electric power plant needs to generate less power it will shut down its least efficient generators, thereby increasing efficiency. The electric train can save energy (as compared to diesel) by regenerative braking and by not needing to consume energy by idling as diesel locomotives do when stopped or coasting. However, electric rolling stock may run cooling blowers when stopped or coasting, thus consuming energy. Large fossil fuel power stations operate at high efficiency, and can be used for district heating or to produce district cooling , leading to

5264-411: The high cost of the electrification infrastructure. Therefore, most long-distance lines in developing or sparsely populated countries are not electrified due to relatively low frequency of trains. Network effects are a large factor with electrification. When converting lines to electric, the connections with other lines must be considered. Some electrifications have subsequently been removed because of

5358-410: The incomplete Flushing and Woodside. Flushing citizens, feeling they had been tricked into building the Flushing and Woodside in order to scare the Flushing and North Side into selling out to the LIRR, convinced wealthy residents of College Point and Whitestone , including Conrad Poppenhusen , to incorporate the Flushing and North Side Railroad on April 3, 1868. This company had the right to build

5452-523: The junction with the Main Line. In January 1987, the station building at the Plandome station was burned to the ground by vandals. Following the fire, the station building was rebuilt as a more modern version of the original. In conjunction with the East Side Access project, the MTA proposed two readiness projects that they said will increase capacity on the Port Washington Branch. The first

5546-494: The line from Flushing to Great Neck in 1866. Originally intending to run further east to Roslyn , Oyster Bay , and even Huntington , the NY&F's plans were thwarted by the LIRR who reached those destinations first, as well as poor service and competition with the 1868-established Flushing and North Side Railroad . In 1869, the New York State Legislature authorized the Flushing and North Side to buy

5640-454: The line. These projects were prerequisites for the extension of the line's second track to Great Neck and Whitestone and the electrification of the line. Grade crossing elimination projects took place during the 1910s and 1920s in Queens and Nassau County. These grade elimination projects included unique station reconstruction in places such as Murray Hill which had a station house built over

5734-442: The losses (saving 2   GWh per year per 100   route-km; equalling about €150,000 p.a.). The line chosen is one of the lines, totalling 6000   km, that are in need of renewal. In the 1960s the Soviets experimented with boosting the overhead voltage from 3 to 6   kV. DC rolling stock was equipped with ignitron -based converters to lower the supply voltage to 3   kV. The converters turned out to be unreliable and

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5828-422: The maximum power that can be transmitted, also can be responsible for electrochemical corrosion due to stray DC currents. Electric trains need not carry the weight of prime movers , transmission and fuel. This is partly offset by the weight of electrical equipment. Regenerative braking returns power to the electrification system so that it may be used elsewhere, by other trains on the same system or returned to

5922-409: The merger with the Central Railroad of Long Island in 1874 ( see below ), although the LIRR did try to extend the line to Roslyn until 1882 due to the difficulty of construction around the Manhasset Valley. On June 19, 1874, all branches of the Flushing and North Side Railroad, including the Main Line to Great Neck were incorporated into the Flushing, North Shore and Central Railroad , which included

6016-402: The need for overhead wires between those stations. Maintenance costs of the lines may be increased by electrification, but many systems claim lower costs due to reduced wear-and-tear on the track from lighter rolling stock. There are some additional maintenance costs associated with the electrical equipment around the track, such as power sub-stations and the catenary wire itself, but, if there

6110-439: The phase separation between the electrified sections powered from different phases, whereas high voltage would make the transmission more efficient. UIC conducted a case study for the conversion of the Bordeaux-Hendaye railway line (France), currently electrified at 1.5   kV DC, to 9   kV DC and found that the conversion would allow to use less bulky overhead wires (saving €20 million per 100   route-km) and lower

6204-440: The problem by insulating the running rails from the current return should there be a leakage through the running rails. The Expo and Millennium Line of the Vancouver SkyTrain use side-contact fourth-rail systems for their 650 V DC supply. Both are located to the side of the train, as the space between the running rails is occupied by an aluminum plate, as part of stator of the linear induction propulsion system used on

6298-438: The proximity of businesses to the narrow right-of-way in Manhasset, and the fact that the Manhasset Viaduct , which carries the line between Great Neck and Manhasset, has only one track. Most peak-hour trains are either local between Manhattan and Great Neck (making all stops) or express between Manhattan and Port Washington (making stops only at Bayside , Great Neck, Manhasset, Plandome station, and Port Washington, although

6392-410: The resistance per unit length unacceptably high compared with the use of DC. Third rail is more compact than overhead wires and can be used in smaller-diameter tunnels, an important factor for subway systems. The London Underground in England is one of few networks that uses a four-rail system. The additional rail carries the electrical return that, on third-rail and overhead networks, is provided by

6486-570: The revenue obtained for freight and passenger traffic. Different systems are used for urban and intercity areas; some electric locomotives can switch to different supply voltages to allow flexibility in operation. Six of the most commonly used voltages have been selected for European and international standardisation. Some of these are independent of the contact system used, so that, for example, 750   V   DC may be used with either third rail or overhead lines. There are many other voltage systems used for railway electrification systems around

6580-429: The running rails. On the London Underground, a top-contact third rail is beside the track, energized at +420 V DC , and a top-contact fourth rail is located centrally between the running rails at −210 V DC , which combine to provide a traction voltage of 630 V DC . The same system was used for Milan 's earliest underground line, Milan Metro 's line 1 , whose more recent lines use an overhead catenary or

6674-419: The same task: converting and transporting high-voltage AC from the power grid to low-voltage DC in the locomotive. The difference between AC and DC electrification systems lies in where the AC is converted to DC: at the substation or on the train. Energy efficiency and infrastructure costs determine which of these is used on a network, although this is often fixed due to pre-existing electrification systems. Both

6768-524: The service "visible" even in no bus is running and the existence of the infrastructure gives some long-term expectations of the line being in operation. Due to the height restriction imposed by the overhead wires, double-stacked container trains have been traditionally difficult and rare to operate under electrified lines. However, this limitation is being overcome by railways in India, China and African countries by laying new tracks with increased catenary height. New York and Flushing Railroad Before

6862-569: The steep approaches to the tunnel. The system was also used for suburban electrification in East London and Manchester , now converted to 25   kV   AC. It is now only used for the Tyne and Wear Metro . In India, 1,500   V DC was the first electrification system launched in 1925 in Mumbai area. Between 2012 and 2016, the electrification was converted to 25   kV 50   Hz, which

6956-443: The supply grid, requiring careful planning and design (as at each substation power is drawn from two out of three phases). The low-frequency AC system may be powered by separate generation and distribution network or a network of converter substations, adding the expense, also low-frequency transformers, used both at the substations and on the rolling stock, are particularly bulky and heavy. The DC system, apart from being limited as to

7050-694: The three-phase induction motor fed by a variable frequency drive , a special inverter that varies both frequency and voltage to control motor speed. These drives can run equally well on DC or AC of any frequency, and many modern electric locomotives are designed to handle different supply voltages and frequencies to simplify cross-border operation. Five European countries – Germany, Austria, Switzerland, Norway and Sweden – have standardized on 15   kV 16 + 2 ⁄ 3   Hz (the 50   Hz mains frequency divided by three) single-phase AC. On 16 October 1995, Germany, Austria and Switzerland changed from 16 + 2 ⁄ 3   Hz to 16.7   Hz which

7144-575: The through traffic to non-electrified lines. If through traffic is to have any benefit, time-consuming engine switches must occur to make such connections or expensive dual mode engines must be used. This is mostly an issue for long-distance trips, but many lines come to be dominated by through traffic from long-haul freight trains (usually running coal, ore, or containers to or from ports). In theory, these trains could enjoy dramatic savings through electrification, but it can be too costly to extend electrification to isolated areas, and unless an entire network

7238-528: The tracks and Great Neck which had an elaborate plaza built around it. In 1929, the station at Winfield Junction was eliminated, making Woodside Station the transfer point between Main Line and Port Washington Branch trains. Despite the elimination of the Whitestone Branch in 1932, as well as Flushing Bridge Street station, Flushing station kept the name " Flushing-Main Street Station ." A new station

7332-466: The train stops with one collector in a dead gap, another multiple unit can push or pull the disconnected unit until it can again draw power. The same applies to the kind of push-pull trains which have a locomotive at each end. Power gaps can be overcome in single-collector trains by on-board batteries or motor-flywheel-generator systems. In 2014, progress is being made in the use of large capacitors to power electric vehicles between stations, and so avoid

7426-713: The train's kinetic energy back into electricity and returns it to the supply system to be used by other trains or the general utility grid. While diesel locomotives burn petroleum products, electricity can be generated from diverse sources, including renewable energy . Historically, concerns of resource independence have played a role in the decision to electrify railway lines. The landlocked Swiss confederation which almost completely lacks oil or coal deposits but has plentiful hydropower electrified its network in part in reaction to supply issues during both World Wars. Disadvantages of electric traction include: high capital costs that may be uneconomic on lightly trafficked routes,

7520-413: The transmission and conversion of electric energy involve losses: ohmic losses in wires and power electronics, magnetic field losses in transformers and smoothing reactors (inductors). Power conversion for a DC system takes place mainly in a railway substation where large, heavy, and more efficient hardware can be used as compared to an AC system where conversion takes place aboard the locomotive where space

7614-470: The tyres do not conduct the return current, the two guide bars provided outside the running ' roll ways ' become, in a sense, a third and fourth rail which each provide 750 V DC , so at least electrically it is a four-rail system. Each wheel set of a powered bogie carries one traction motor . A side sliding (side running) contact shoe picks up the current from the vertical face of each guide bar. The return of each traction motor, as well as each wagon ,

7708-432: The voltage, the lower the current for the same power (because power is current multiplied by voltage), and power loss is proportional to the current squared. The lower current reduces line loss, thus allowing higher power to be delivered. As alternating current is used with high voltages. Inside the locomotive, a transformer steps the voltage down for use by the traction motors and auxiliary loads. An early advantage of AC

7802-405: The weight of an on-board transformer. Increasing availability of high-voltage semiconductors may allow the use of higher and more efficient DC voltages that heretofore have only been practical with AC. The use of medium-voltage DC electrification (MVDC) would solve some of the issues associated with standard-frequency AC electrification systems, especially possible supply grid load imbalance and

7896-562: The west end of the Little Neck Station . The Port Washington Branch was built by the Flushing Railroad , in 1854 from Hunters Point in Long Island City to Flushing , before the LIRR opened its line to Long Island City. It was the first non-LIRR line on Long Island. The company was reorganized in 1859 as the New York and Flushing Railroad , and established a subsidiary known as the North Shore Railroad to extend

7990-532: The world, and the list of railway electrification systems covers both standard voltage and non-standard voltage systems. The permissible range of voltages allowed for the standardised voltages is as stated in standards BS   EN   50163 and IEC   60850. These take into account the number of trains drawing current and their distance from the substation. 1,500   V DC is used in Japan, Indonesia, Hong Kong (parts), Ireland, Australia (parts), France (also using 25 kV 50 Hz AC ) ,

8084-534: The world, including China , India , Japan , France , Germany , and the United Kingdom . Electrification is seen as a more sustainable and environmentally friendly alternative to diesel or steam power and is an important part of many countries' transportation infrastructure. Electrification systems are classified by three main parameters: Selection of an electrification system is based on economics of energy supply, maintenance, and capital cost compared to

8178-548: Was abandoned in favor of the ex-New York and Flushing line. Since both the NY&F and F&NS planned to expand service east of Great Neck, subsidiaries of the railroad were created for this purpose. In the case of the F&NS, two proposed railroads included the North Shore and Port Washington Railroad and the Roslyn and Huntington Railroad. Neither of these proposals were carried out. In fact, they were eliminated during

8272-466: Was built just in time for the 1939 New York World's Fair then reused for the United Nations , and then the 1964 New York World's Fair and simultaneously Shea Stadium , for which it would be renamed in 1966. This was the last station to be built on the line. By 1985, when Elmhurst station closed, Shea Stadium station would also become the westernmost station on the Port Washington Branch before

8366-437: Was exacerbated because the return current also had a tendency to flow through nearby iron pipes forming the water and gas mains. Some of these, particularly Victorian mains that predated London's underground railways, were not constructed to carry currents and had no adequate electrical bonding between pipe segments. The four-rail system solves the problem. Although the supply has an artificially created earth point, this connection

8460-553: Was first applied successfully by Frank Sprague in Richmond, Virginia in 1887-1888, and led to the electrification of hundreds of additional street railway systems by the early 1890s. The first electrification of a mainline railway was the Baltimore and Ohio Railroad's Baltimore Belt Line in the United States in 1895–96. The early electrification of railways used direct current (DC) power systems, which were limited in terms of

8554-562: Was merged with the LIRR on April 2, 1889. Despite a failed attempt to extend the line from Great Neck to Roslyn in 1882, wealthy Port Washington residents persuaded the LIRR to bring the terminus to their hometown in 1895. This required the construction of the Manhasset Viaduct over the marshes at the southern end of Manhasset Bay, which was authorized by an LIRR subsidiary called the Great Neck and Port Washington Railroad (GN&PW). According to Manhasset's website, "in 1897,

8648-430: Was not built until decades after the line was acquired by the LIRR. In 1869, the New York State Legislature authorized the Flushing and North Side to buy the New York and Flushing east of the LIRR crossing at Winfield Junction connections were built by the Flushing and North Side at Woodside/Winfield and Flushing to connect its lines. The New York and Flushing continued to own the line west of Winfield, and soon became

8742-496: Was scheduled to begin in late 2020 or early 2021 at a cost of $ 500,000. However, this project met significant community opposition, primarily because of proposed reduction of parking spaces near the station. As of September 2022, the MTA has not come to an agreement with the Town of North Hempstead , resulting in the project being postponed indefinitely. On July 9, 2024, the sides agreed to a memorandum of understanding (MOU) under which

8836-409: Was the extension of a pocket track east of Great Neck station, located between the station and where the line becomes single-tracked. The pocket track was extended eastward by 1,200 feet (370 m) to allow for storage of a second trainset, in addition to the one that the original pocket track could store. The construction of the pocket track was originally scheduled for completion in December 2018 at

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