The Watford DC line is a suburban railway line from London Euston to Watford Junction in Greater London and Hertfordshire . Its services are operated by London Overground for the whole length of the line and the Bakerloo line of the London Underground between Harrow & Wealdstone and Queen's Park .
141-734: Since November 2024, the line has been branded the Lioness line by TfL, following a rebranding of the London Overground services which operate on the line. The line runs beside the West Coast Main Line (WCML) for most of its length. The rolling stock used on the line are the London Overground Class 710 "Aventras" made by Bombardier and the London Underground 1972 Stock . The "DC" in
282-402: 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
423-418: A London–Glasgow time of 4 hours 8 minutes. Some projects that were removed from the modernisation as a result of the de-scoping, such as a flyover at Norton Bridge station, were later restarted. A £250 million project to grade-separate the tracks at Norton Bridge that allowed for increased service frequency as well as improved line-speeds was completed in spring 2016. Other projects such as
564-502: A garden shed. In 1988 the LMS system was replaced by a more standard system controlled from a new signal box, Willesden Suburban, and the remaining local boxes were abolished. The new system had solid state interlocking, but far fewer signals; as a consequence the maximum traffic capacity of the line was severely reduced. In the early 1960s there were headways of less than 2 minutes between Harrow & Wealdstone and Willesden Junction stations,
705-573: 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
846-467: 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
987-537: 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
1128-457: 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
1269-410: A reappraisal of the plans, while the cost of the upgrade soared. Following fears that cost overruns on the project would push the final price tag to £13 billion, the plans were scaled down, bringing the cost down to between £8 billion and £10 billion, to be ready by 2008, with a maximum speed for tilting trains of a more modest 125 mph (201 km/h) – equalling the speeds available on
1410-498: 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
1551-481: 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
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#17327726779121692-418: 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
1833-522: A track realignment scheme to raise speeds on the WCML; a proposed project called InterCity 250 , which entailed realigning parts of the line in order to increase curve radii and smooth gradients in order to facilitate higher-speed running. The scheme, which would have seen the introduction of new rolling stock derived from that developed for the East Coast electrification, was scrapped in 1992. As part of
1974-527: A useful alternative route to Manchester, however poor relations between the LNWR and the NSR meant that through trains did not run until 1867. The route to Scotland was marketed by the LNWR as 'The Premier Line'. Because the cross-border trains ran over the LNWR and Caledonian Railway, through trains consisted of jointly owned "West Coast Joint Stock" to simplify operations. The first direct London to Glasgow trains in
2115-499: Is 399 miles (642 km) long, with principal InterCity stations at Watford Junction , Milton Keynes Central , Rugby , Stafford , Crewe , Warrington Bank Quay , Wigan North Western , Preston , Lancaster , Oxenholme Lake District , Penrith and Carlisle . The spine has bypasses serving the major towns and cities of Northampton , Coventry , Birmingham and Wolverhampton . Spurs serve Stoke-on-Trent , Macclesfield , Stockport , Manchester, Runcorn and Liverpool . There
2256-442: Is a short double track stretch through the 777-yard (710 m) Shugborough Tunnel. The line is then quadruple track most of the way to Acton Bridge railway station, except for a double track section between Winsford and Hartford. The line is double track from Acton Bridge railway station to Weaver Junction (where a double track spur to Liverpool branches off). The line is double track from Weaver Junction to Warrington Bank Quay, but
2397-618: Is also a branch to Edinburgh , at Carstairs in Scotland which is not the most direct route between London and Edinburgh. It provides a direct connection between the WCML and the East Coast Main Line . Originally, the lines between Rugby , Birmingham and Stafford were part of the main spine, until the Trent Valley Line was built in 1847. This line formed a direct connection between Rugby and Stafford becoming
2538-463: Is currently electrified (like all shared lines) using the standard compromise voltage of 660 V DC. This falls comfortably within the lower permanent voltage limit for the Class 378 "Capitalstar" stock (500 V) and the upper permanent voltage limit for the 1972 tube stock (760 V). The line has now been converted to 750 V DC for the new Class 710 "Aventra". A consequence of converting to third rail with
2679-411: 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
2820-451: 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
2961-526: 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
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#17327726779123102-564: Is entirely electrified – this situation is, however, changing since the expansion of the Pendolino fleet; from 2013 onward Class 390 sets have been routinely deployed on Edinburgh/Glasgow–Birmingham services. By 2012, the WCML Pendolino fleet was strengthened by the addition of two coaches to 31 of the 52 existing sets, thus turning them into 11-car trains. Four brand new 11-car sets are also part of this order, one of which replaced
3243-486: 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
3384-778: 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
3525-723: Is one of the busiest freight routes in Europe, carrying 40% of all UK rail freight traffic. The line is the principal rail freight corridor linking the European mainland (via the Channel Tunnel ) through London and South East England to the West Midlands, North West England and Scotland. The line has been declared a strategic European route and designated a priority Trans-European Networks (TENS) route. A number of railway writers refer to it as "The Premier line". The WCML
3666-514: Is one of the most important railway corridors in the United Kingdom, connecting the major cities of London and Glasgow with branches to Birmingham , Manchester , Liverpool and Edinburgh . It is one of the busiest mixed-traffic railway routes in Europe, carrying a mixture of intercity rail , regional rail , commuter rail and rail freight traffic. The core route of the WCML runs from London to Glasgow for 400 miles (644 km) and
3807-447: 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
3948-410: 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
4089-894: 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
4230-580: 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
4371-546: Is the loss of through services between Liverpool and Scotland; however these were restored by TransPennine Express in 2019. British Rail introduced the Advanced Passenger Train APT project, which proved that London–Glasgow WCML journey times of less than 4 hours were achievable and paved the way for the later tilting Virgin Pendolino trains. In the late 1980s, British Rail put forward
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4512-420: 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 is supplied to moving trains with
4653-838: 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
4794-487: The Birmingham branch , and the routes to Manchester via Stoke-on-Trent was completed on 6 March 1967, allowing electric services to commence to those destinations. In March 1970 the government approved electrification of the northern half of the WCML, between Weaver Junction (where the branch to Liverpool diverges) and Glasgow, and this was completed on 6 May 1974. The announcement, after five years of uncertainty,
4935-656: 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
5076-647: 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
5217-701: 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
5358-629: The London and Birmingham Railway was completed, connecting to the capital via Coventry , Rugby and the Watford Gap . The Grand Junction and London and Birmingham railways shared a Birmingham terminus at Curzon Street station , so that it was now possible to travel by train between London, Birmingham, Manchester and Liverpool. These lines, together with the Trent Valley Railway (between Rugby and Stafford, avoiding Birmingham) and
5499-584: The Manchester and Birmingham Railway (Crewe–Manchester), amalgamated operations in 1846 to form the London and North Western Railway (LNWR). Three other companies, the North Union Railway ( Parkside –Wigan–Preston), the Lancaster and Preston Junction Railway and the Lancaster and Carlisle Railway , completed a through route to Carlisle by the end of 1846, these were later absorbed by
5640-488: The Mark 2 and from 1974 the fully integral , air-conditioned Mark 3 design. These remained the mainstay of express services until the early 2000s. Line speeds were raised to a maximum 110 mph (180 km/h), and these trains, hauled by Class 86 and Class 87 electric locomotives, came to be seen as BR's flagship passenger service. Passenger traffic on the WCML doubled between 1962 and 1975. The modernisation also saw
5781-658: The North London Railway to Broad Street . Pressure from local groups led to the building of a curve near Bushey , diverting the main route for new services over the existing branch line north to Watford Junction instead of south to Rickmansworth. In 1917 LER Bakerloo line services were extended over the new line from Queen's Park station to Watford Junction . Bakerloo line services were cut back in stages and ceased north of Stonebridge Park station in 1982; in 1984 they were restored as far as Harrow and Wealdstone . The Croxley Green branch fell into disuse in
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5922-649: The Quintinshill rail disaster , occurred on the WCML during World War I , on 22 May 1915, between Glasgow Central and Carlisle, in which 227 were killed and 246 injured. The entire route came under the control of the London, Midland and Scottish Railway (LMS) on 1 January 1923 when the railway companies were grouped , under the Railways Act 1921 . The LMS competed fiercely with the rival LNER 's East Coast Main Line for London to Scotland traffic (see Race to
6063-636: 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
6204-461: 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
6345-454: The death of Queen Elizabeth II , locomotive hauled services returned briefly to the WCML once more when incumbent operator Avanti West Coast employed a rake of Mark 3 coaches (hauled by a Class 90 locomotive) to provide additional services to Euston for those wishing to travel to London for the Queen's lying-in-state and subsequent funeral. The following table lists the rolling stock which forms
6486-570: The early railway era was for companies to promote individual lines between two destinations, rather than to plan grand networks of lines, as it was considered easier to obtain backing from investors. The first stretch of what is now the WCML was the Grand Junction Railway connecting the Liverpool and Manchester Railway to Birmingham , via Warrington , Crewe , Stafford and Wolverhampton , opening in 1837. The following year
6627-598: The privatisation of British Rail in the 1990s, the infrastructure was taken over in 1994 by the private company Railtrack , which later collapsed in 2002, and was replaced by the not-for-profit company Network Rail . WCML's InterCity services became part of the InterCity West Coast franchise , which was won by Virgin Trains who took over in 1997. In 2019, Avanti West Coast won the new West Coast Partnership franchise, taking over from Virgin Trains. By
6768-536: The 1850s took 12.5 hours to complete the 400-mile (640 km) journey. The final sections of what is now the WCML were put in place over the following decades. A direct branch to Liverpool , bypassing the earlier Liverpool and Manchester line, was opened in 1869, from Weaver Junction north of Crewe to Ditton Junction via the Runcorn Railway Bridge over the River Mersey . At
6909-445: The 1980s; an ill-fated high speed train which used tilting technology , which was required to allow faster speeds on the curving route, and the abortive InterCity 250 project in the early-1990s. Further modernisation of the route finally occurred during the 2000s in the period of privatisation , which saw speeds raised further to 125 mph (201 km/h) and the introduction of tilting Class 390 Pendolino trains. As much of
7050-661: The 1990s, and is now derelict. In the early 2000s the county council proposed to divert the Metropolitan line over the branch and on to Watford Junction (for more information see Croxley Rail Link ). The line was operated by British Rail (from 1986 as Network SouthEast ) until privatisation. In the Network SouthEast period, it was briefly rebranded as the Harlequin line , after the stations of Harlesden and Queen's Park . From March 1997 until November 2007,
7191-598: The 2010-2017 timeframe. The Wigan North Western to Lostock Parkway branch is also in the process of being electrified. The majority of stock used on the West Coast Main Line is new-build, part of Virgin's initial franchise agreement having been a commitment to introduce a brand-new fleet of tilting Class 390 "Pendolino" trains for long-distance high-speed WCML services. The 53-strong Pendolino fleet, plus three tilting SuperVoyager diesel sets, were bought for use on these InterCity services. One Pendolino
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#17327726779127332-613: The Camden to Watford Junction new line in 1912, to provide additional suburban capacity and more outer-suburban services running non-stop to Euston. It incorporated part of the LNWR Rickmansworth branch (formerly the Watford and Rickmansworth Railway ) between Watford Junction and Watford High Street Junction and part of the original slow main line between Queen's Park and South Hampstead stations; two single-track tunnels take
7473-615: The Crewe–Manchester line via Wilmslow was completed in summer 2006. In September 2006, a new speed record was set on the WCML ;– a Pendolino train completed the 401-mile (645 km) Glasgow Central – London Euston run in a record 3 hours 55 minutes, beating the APT's record of 4 hours 15 minutes, although the APT still holds the overall record on the northbound run. The decade-long modernisation project
7614-558: The DC line are: During the partial closure of the North London Line in autumn 2008, London Overground's Monday to Saturday services were diverted away from Euston, running instead via Camden Road onto the North London Line and on to Stratford; the Sunday service was normal. London Northwestern Railway also run a fast service between Watford Junction and London Euston along the West Coast Main Line (which runs parallel to
7755-539: The DC line at Watford High Street, potentially forming an interchange either with London Overground or the Bakerloo line, depending on the outcome of other projects. Funding for this project was agreed during November 2015, however after cost overruns and disagreements over funding sources, work on the project stopped in 2017, and it was confirmed in 2018 that the project would not be going ahead in its current form. In July 2023 TFL announced that it would be giving each of
7896-488: The East Coast route, but some way short of the original target, and even further behind BR's original vision of 155 mph (250 km/h) speeds planned and achieved with the APT. The first phase of the upgrade, south of Manchester, opened on 27 September 2004 with journey times of 1 hour 21 minutes for London to Birmingham and 2 hours 6 minutes for London to Manchester. The final phase, introducing 125 mph (201 km/h) running along most of
8037-758: The LNWR. North of Carlisle, the Caledonian Railway remained independent, and opened its main line from Carlisle to Beattock on 10 September 1847, connecting to Edinburgh in February 1848, and to Glasgow in November 1849. Another important section, the North Staffordshire Railway (NSR), which opened its route in 1848 from Macclesfield (connecting with the LNWR from Manchester) to Stafford and Colwich Junction via Stoke-on-Trent , also remained independent. The NSR provided
8178-799: The Midlands and this area has been called the " Golden Triangle of Logistics ". Nearly all of the WCML is electrified with overhead line equipment at 25 kV AC . Several of the formerly unelectrified branches of the WCML in the North West have recently been electrified such as the Preston to Blackpool North Line on which electric service commenced in May 2018 along with the Preston – Manchester Piccadilly line which saw electric service commence in February 2019. Wigan to Liverpool via St Helens Shaw Street and St Helens Junction were also electrified in
8319-717: 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
8460-410: The North ). Attempts were made to minimise end-to-end journey times for a small number of powerful lightweight trains that could be marketed as glamorous premium crack expresses, especially between London and Glasgow, such as the 1937–39 Coronation Scot , hauled by streamlined Princess Coronation Class locomotives, which made the journey in 6 hours 30 minutes, making it competitive with
8601-403: The UK, BR carried out an extensive programme of modernisation of it between the late 1950s and early 1970s, which included full overhead electrification of the route, and the introduction of modern intercity passenger services at speeds of up to 110 mph (177 km/h). Further abortive modernisation schemes were proposed, including the introduction of the Advanced Passenger Train (APT) in
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#17327726779128742-427: 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
8883-586: The WCML) were given 30 new "Desiro" Class 350s , originally ordered for services in the south-east. Following Govia 's successful bid for the West Midlands franchise in 2007, another 37 Class 350 units were ordered to replace its older fleet of Class 321s . The older BR-vintage locomotive-hauled passenger rolling stock still has a limited role on the WCML, with the overnight Caledonian Sleeper services between London Euston and Scotland using Mark 3 and Mark 2 coaches until their replacement with Mark 5 stock in October 2019. Virgin also retained and refurbished one of
9024-431: The Watford DC Line), calling at Bushey and Harrow & Wealdstone before running non-stop to Euston. The service offers a quicker alternative to the all-stations London Overground service, especially as the operator now accepts TfL's Oystercard ticketing. Some peak services to/from Euston are advertised as starting/terminating at South Hampstead or Queens Park or Harrow and Wealdstone in order to persuade passengers to take
9165-486: The a part of the spine. South of Rugby, there is a bypass loop that serves Northampton . There is a spur at Weaver Junction north of Crewe to Liverpool . Weaver Junction on this branch is the oldest flyover-type junction in Britain. A spur branches off from Crewe to serve Manchester . There is also a spur between Colwich Junction in the Trent Valley, south of Stafford to Stoke-on-Trent, with another spur north of Stafford, also to Stoke-on-Trent. The geography of
9306-494: 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
9447-516: 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
9588-489: The core passenger service pattern on the WCML serving its principal termini; it is not exhaustive as many other types use small sections of the WCML as part of other routes. Fourth rail Railway electrification 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
9729-729: The dawn of the 1990s, it was clear that further modernisation was required. Initially this took the form of the InterCity 250 project. The modernisation plan unveiled by Virgin and the new infrastructure owner Railtrack involved the upgrade and renewal of the line to allow the use of tilting Pendolino trains with a maximum line speed of 140 mph (225 km/h), in place of the previous maximum of 110 mph (177 km/h). Railtrack estimated that this upgrade would cost £2 billion, be ready by 2005, and cut journey times to 1 hour for London to Birmingham and 1 hr 45 mins for London to Manchester. However, these plans proved too ambitious and were subsequently scaled back. The upgrade
9870-400: The demolition and redevelopment of several of the key stations on the line: BR was keen to symbolise the coming of the "electric age" by replacing the Victorian-era buildings with new structures built from glass and concrete. Notable examples were Birmingham New Street , Manchester Piccadilly , Stafford , Coventry and London Euston . To enable the latter, the famous Doric Arch portal into
10011-410: 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
10152-505: The early 1930s over most of the route and some signal boxes were abolished. A similar system was also used for a shorter period between Bromley-by-Bow and Upminster now part of the District line . The very closely spaced mix of automatic and semi-automatic signals, repeater signals, and auxiliary calling-on aspects was intended to let trains to proceed, after a set delay, at low speed past "failed" signals on track with no junctions without
10293-453: The economic climate of the time. The early history of the WCML is complex, as it was not originally conceived as a single trunk route, but was built as a patchwork of separate lines by different companies, mostly during the 1830s and 1840s, but some parts were opened as late as the 1880s. After the completion of the pioneering Liverpool and Manchester Railway in 1830, schemes were mooted to build more inter-city lines. The business practice of
10434-448: 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
10575-630: The empty trackbed is still visible at Harrow & Wealdstone adjacent to the eastern ticket office. Another proposal to bring London Underground service to Watford Junction was the Croxley Rail Link , which envisaged diverting the Watford branch of the Metropolitan line along a re-opened stretch of track to the west of Watford, effectively reinstating the former Croxley Green to Watford Junction service. Underground trains would then join
10716-404: 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
10857-591: 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
10998-500: 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
11139-560: The fourth rail provided only for LU use was that both planned and emergency use of the line by other 3rd-rail-capable trains was possible. Ignoring recent use of Class 508 trains, this last took place when Class 416 trains were diverted to Willesden Junction Low Level station when part of the North London Line was closed for a number of weeks in the late 1980s. The electricity grid Willesden substation in Acton Lane, Park Royal supplies 11 kV, three-phase power to ten substations on
11280-524: The frequent faster services . Past services have included: When the south curve of the triangular junction between Watford High Street and Bushey existed, a few trains used Croxley Depot (now demolished), which was shared by LU and BR trains. An interchange with the Stanmore branch line once existed at Harrow & Wealdstone. This short branch line was closed in 1964 as part of the Beeching cuts ;
11421-1012: 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
11562-411: 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
11703-500: The limit of LU operation, the fourth rail has in most places been dropped onto the sleepers and remains bonded, thus leaving the resistance of the current return path unaltered. The fourth rail remains in the normal position from Queens Park to Kilburn High Road up platform, where a trailing crossover between those two stations is maintained in use to allow reversal of Bakerloo line trains unable to gain access to London Underground at Queens Park, due to planned work or other reasons. The line
11844-744: The line from South Hampstead to Camden, whence the line reaches Euston station by the main-line tracks. Prior to 1912, at which time the entire route was finally electrified, services were steam operated. Although the operation of the line is mostly self-contained, connections at Watford Junction and Camden allow other trains onto it, a facility used occasionally with trains diverted from the West Coast Main Line should an alternative diversionary route be not available. The line opened with conventional semaphore signalling mechanically operated from signal boxes at each station, this system remained in use after electrification. The London, Midland and Scottish Railway introduced an automatic electric signalling system in
11985-468: The line has a maximum speed of 125 mph (201 km/h), it meets the European Union 's definition of an upgraded high-speed line , although only Class 390 Pendolinos and Class 221 Super Voyagers with tilting mechanisms operated by Avanti West Coast travel at that speed. Non-tilting trains are limited to 110 mph (177 km/h). The spine between London Euston and Glasgow Central
12126-473: The line is quadruple track between Warrington Bank Quay to Wigan North Western. At Newton-le-Willows, the slow tracks join the Liverpool to Manchester line to pass through the centre of the town, while the fast tracks take the direct route via the Golborne cut-off. There are two more stretches of quadruple track, otherwise the line is double track to Scotland. The first is from Euxton Balshaw Lane to Preston, and
12267-459: The line was operated by Silverlink . In November 2007 Transport for London (TfL) took full management control of all the intermediate Watford DC line stations as part of the London Overground (LO) service with staffing during opening hours, automatic ticket gates and planned station refurbishment to the standard of the Tube network. Stations on the line: The local passenger services which run over
12408-550: The line, located at Camden, South Hampstead, Queens Park, Willesden, Harlesden, Wembley, Kenton, Harrow, Hatch End, Bushey and Watford. The construction of a curve to link Rickmansworth (Church Street) to the Euston main line was planned. A new line would have then run south to Wembley , then passed under the main line and run on the east side to Euston, terminating in a loop. The loop was dropped on grounds of cost and, instead, services terminated at Euston main platforms or ran on
12549-548: The line, was announced as opening on 12 December 2005, bringing the fastest journey between London and Glasgow to 4 hours 25 mins (down from 5 hours 10 minutes). However, considerable work remained, such as the quadrupling of the track in the Trent Valley, upgrading the slow lines, the second phase of remodelling Nuneaton, and the remodelling of Stafford, Rugby, Milton Keynes and Coventry stations, and these were completed in late 2008. The upgrading of
12690-497: 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
12831-422: 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
12972-601: The mid 1980s by Class 313 units. The line is now operated by London Overground Class 710 "Aventra" units. In the 1970s, the track and the rolling stock used on this line and the North London Line were changed to use a modified version of the BR standard third rail system, with the fourth rail (now bonded to the running rail used for returning traction current) left in place on the sections of line shared with LU Bakerloo line trains. North of Harrow & Wealdstone, now
13113-402: 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
13254-463: The need to contact a signalman, but this could lead to a nose-to-tail queue of trains as they all reached the location of a real line blockage. Train stops were provided (except at repeater signals) to allow London Electric Railway (LER) trains to operate over the line without the special provision of a second man; this enabled the same practice to be continued with all other Underground and main line stock subsequently allocated to this line and which
13395-679: The northern end, the Caledonian replaced its original Southside terminus in Glasgow, with the much larger and better located Glasgow Central in 1879. To expand capacity, the line between London and Rugby was widened to four tracks in the 1870s. As part of this work, a new line, the Northampton Loop , was built, opening in 1881, connecting Northampton before rejoining the main line at Rugby. The worst-ever rail accident in UK history,
13536-853: The original Philip Hardwick -designed terminus was demolished in 1962 amid much public outcry. Electrification of the Edinburgh branch was carried out in the late 1980s as part of the East Coast Main Line electrification project in order to allow InterCity 225 sets to access Glasgow via Carstairs Junction. Modernisation brought great improvements in speed and frequency. However some locations and lines were no longer served by through trains or through coaches from London, such as: Windermere ; Barrow-in-Furness , Whitehaven and Workington ; Huddersfield , Bradford Interchange , Leeds and Halifax (via Stockport); Blackpool South ; Colne (via Stockport); Morecambe and Heysham ; Southport (via Edge Hill ); Blackburn and Stranraer Harbour. Notable also
13677-444: The original Mark 3 rakes with a Driving Van Trailer and a Class 90 locomotive as a standby set to cover for Pendolino breakdowns. This set was retired from service on 25 October with a rail tour the following day. In November 2014, the "Pretendolino" was transferred to Norwich Crown Point depot to enter service with Abellio Greater Anglia having come to the end of its agreed lease to Virgin Trains. In September 2022, following
13818-552: The other main line between London and Scotland. The principal solution has been the adoption of tilting trains , initially with British Rail 's APT and latterly the Class 390 Pendolino trains constructed by Alstom and introduced by Virgin Trains in 2003. A 'conventional' attempt to raise line speeds as part of the InterCity 250 upgrade in the 1990s would have relaxed maximum cant levels on curves and seen some track realignments; this scheme faltered for lack of funding in
13959-505: 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
14100-508: 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
14241-744: The replacement of a weak bridge in Watford allowed line-speeds to be increased from 90 mph (145 km/h) to 125 mph (201 km/h), decreasing journey times. The main spine of the WCML is quadruple track almost all of the route from London to south of Winsford . At Hanslope Junction (near Milton Keynes ), the line divides with one pair going direct to Rugby and the other pair diverting via Northampton to rejoin at Rugby. The spine continues north in quadruple track until Brinklow, where it reduces to triple track. The line between Brinklow and Nuneaton has three tracks, with one northbound track and fast and slow southbound tracks. The line then reverts to quadruple track at Nuneaton. North of Rugeley, there
14382-465: 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
14523-570: 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
14664-433: The rival East Coast Flying Scotsman (British Railways in the 1950s could not match this, but did achieve a London-Glasgow timing of 7 hours 15 minutes in the 1959–60 timetable by strictly limiting the number of coaches to eight and not stopping between London and Carlisle. ) In 1948, following nationalisation , the line came under the control of British Railways ' London Midland and Scottish Regions , when
14805-550: The route was determined by avoiding large estates and hilly areas, such as the Chilterns ( Tring Cutting ); the Watford Gap and Northampton uplands, followed by the Trent Valley; the mountains of Cumbria , with a summit at Shap ; and Beattock Summit in South Lanarkshire . This legacy means the WCML has limitations as a long-distance main line, with lower maximum speeds than the East Coast Main Line (ECML) route,
14946-435: The route with overhead line equipment. The first stretch to be upgraded and electrified was Crewe to Manchester, completed on 12 September 1960. This was followed by Crewe to Liverpool, completed on 1 January 1962. Electrification was then extended south to London. The first electric trains from London ran on 12 November 1965, with a full public service to Manchester and Liverpool launched on 18 April 1966. Electrification of both
15087-498: 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
15228-467: 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
15369-529: The second is a busy section around Glasgow. The WCML is noted for the diversity of branches served from the spine, notably those to/from the West Midlands and North Wales , Greater Manchester , and Liverpool. These are detailed in the route diagram . The complete route has been cleared for W10 loading gauge freight traffic, allowing use of higher 9 ft 6 in (2,896 mm) hi-cube shipping containers . The route passes through Nuneaton and
15510-491: The section of line used by nearly all services. In the early 2000s Willesden Suburban was closed and control passed to Wembley Main Line Signalling Centre. The original electrification was on a fourth rail system, similar to that now used by London Underground, which allowed LER trains to use the new line. Power was supplied from the railway's own power station at Stonebridge Park until the 1960s when it
15651-681: The set lost in the Grayrigg derailment. Although the new stock was supplied in Virgin livery, it was not expected to enter traffic before 31 March 2012, when the InterCity West Coast franchise was due to be re-let, though the date for the new franchise was later put back to December 2012, and any effect of this on the timetable for introducing the new coaches remains unclear. Previous franchisees Central Trains and Silverlink (operating local and regional services partly over sections of
15792-674: The six rail lines, including the Watford to Euston route, new names by the end of 2024. In February 2024, it was confirmed that the Watford DC line would be named the Lioness line (to honour the England women's national football team who became European champions at Wembley Stadium in 2022 ) and would be coloured yellow on the updated network map. [REDACTED] London transport portal West Coast Main Line The West Coast Main Line ( WCML )
15933-569: 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
16074-443: 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
16215-460: The technical viability and cost of implementing moving block prior to promising the speed increase to Virgin and the government. By 1999, with little headway on the modernisation project made, it became apparent to engineers that the technology was not mature enough to be used on the line. The bankruptcy of Railtrack in 2001 and its replacement by Network Rail following the Hatfield crash brought
16356-409: The term "West Coast Main Line" came into use officially, although it had been used informally since at least 1912. As part of the 1955 modernisation plan , British Rail carried out a large programme of modernisation of the WCML in stages between 1959 and 1974; the modernisation involved upgrading the track and signaling to allow higher speeds, rebuilding a number of stations, and electrification of
16497-694: 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
16638-575: 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
16779-575: The title refers to line being electrified using direct current . This was done in the early twentieth century with conductor rails to be compatible with the four-rail system used by the Underground and, at the time, the North London Line ; currently, the line uses a third rail system, with a fourth rail available on the section shared with the Bakerloo line. By contrast, the WCML uses overhead alternating current . Services on this line began when London and North Western Railway (LNWR) completed
16920-466: 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
17061-713: 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,
17202-413: 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
17343-470: 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 ,
17484-432: 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
17625-405: 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
17766-532: 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 ) ,
17907-534: 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
18048-460: Was closed, after which it has been obtained from public supplies. As originally installed, there was provision for interconnection of the high voltage section of the power station to adjacent public supplies for output or intake but this ceased when national supplies were standardised at 50 Hz. In the late 1950s, the original electric multiple units built for the line were replaced by new Class 501 rolling stock. These were in turn displaced in
18189-419: Was described as "a classic example of disastrous project management". Central to the implementation of the plan was the adoption of moving block signalling , which had never been proven on anything more than simple metro lines and light rail systems – not on a complex high-speed heavy-rail network such as the WCML. Despite this, Railtrack made what would prove to be the fatal mistake of not properly assessing
18330-437: 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
18471-482: Was finally completed in December 2008. This allowed Virgin's VHF (very high frequency) timetable to be progressively introduced through early 2009, the highlights of which are a three-trains-per-hour service to both Birmingham and Manchester during off-peak periods, and nearly all London-Scottish timings brought under the 4 hours 30 minutes barrier – with one service (calling only at Preston) achieving
18612-553: 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
18753-399: Was later dropped) and offering journey times as London to Birmingham in 1 hour 35 minutes, and London to Manchester or Liverpool in 2 hours 40 minutes (and even 2 hours 30 minutes for the twice-daily Manchester Pullman ). This represented a big improvement on the 3 hours 30 minutes to Manchester and Liverpool of the fastest steam service. A new feature
18894-479: Was made 48 hours before the writ was issued for a by-election in South Ayrshire . The Observer commented that, if the £25 million decision was politically rather than financially motivated, it would have the makings of a major political scandal. A new set of high-speed long-distance services was introduced in 1966, launching British Rail's highly successful " Inter-City " brand (the hyphen
19035-445: Was mostly built between the 1830s and 1850s, but several cut-off routes and branches were built in later decades. In 1923, the entire route came under the ownership of the London, Midland and Scottish Railway (LMS) when the railway companies were grouped under the Railways Act 1921 . The LMS itself was nationalised in 1947 to form part of British Railways (BR). As the WCML is the most important long-distance railway trunk route in
19176-403: Was needed for a few months after dragging gear on a train destroyed many electric train-stops which were of a design almost confined to this line (LU train-stops are mostly electro-pneumatic). By this time the signal boxes at Stonebridge Power House and Kilburn High Road had been abolished. Emergency crossovers at other locations were controlled by ground frames enclosed in structures the size of
19317-456: Was not originally conceived as a single route, but was built as a patchwork of local lines which were linked together, built by various companies, the largest of which amalgamated in 1846 to create the London and North Western Railway (LNWR), which then gradually absorbed most of the others; the exceptions were the Caledonian Railway in Scotland, and the North Staffordshire Railway (NSR) which both remained independent until 1923. The core route
19458-685: Was opened from 1837 to 1881. With additional lines deviating to Northampton , Birmingham, Manchester, Liverpool and Edinburgh, this totals a route mileage of 700 miles (1,127 km). The Glasgow–Edinburgh via Carstairs line connects the WCML to Edinburgh. However, the main London–Edinburgh route is the East Coast Main Line . Several sections of the WCML form part of the suburban railway systems in London, Coventry , Birmingham, Manchester, Liverpool and Glasgow, with many more smaller commuter stations, as well as providing links to more rural towns. It
19599-401: Was provided with trip equipment. Signal boxes remaining in use in the early 1970s included: Normally Kilburn High Road and Stonebridge Power House which controlled only plain track with crossovers were switched out and only Queens Park, Willesden and Harrow boxes were staffed for at least part of the day, to deal with junction and siding traffic. In the early 1980s manual control of signalling
19740-479: Was that these fast trains were offered on a regular-interval service throughout the day: initially hourly to Birmingham, two-hourly to Manchester, and so on. The service proved to be so popular that in 1972 these InterCity service frequencies were doubled to deal with increased demand. With the completion of the northern electrification in 1974, London to Glasgow journey times were reduced from 6 hours to 5. Along with electrification came modern coaches such as
19881-693: Was written off in 2007 following the Grayrigg derailment . After the 2007 franchise "shake-up" in the Midlands, more SuperVoyagers were transferred to Virgin West Coast, instead of going to the new CrossCountry franchise. The SuperVoyagers are used on London–Chester and Holyhead services because the Chester/North Wales line is not electrified, so they run "under the wires" between London and Crewe. SuperVoyagers were also used on Virgin's London-Scotland via Birmingham services, even though this route
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