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Potters Bar Rail Accidents
There have been four railway accidents at Potters Bar in England. Those in 1898 and 1946 were signals passed at danger. The accident in 2002 led to substantial public debate and a national change in policy relating to maintenance of infrastructure. 1898 On 19 March 1898, the 7:50 p.m train from Hatfield to King's Cross ran past the signals at danger when it reached Potters Bar. The train cut through the catch points and buffers and crashed onto the platform. The front part of the engine was smashed and the leading coach wrecked. No one was killed. The driver, fireman and guard narrowly escaped injury. Some passengers complained of being shaken but were able to go home.PBHistory.co.uk , Railway Crashes 1899 On 16 May 1899, the |
West Anglia Great Northern
West Anglia Great Northern, commonly shortened to ''WAGN'', was a train operating company in England. It operated the West Anglia Great Northern franchise between January 1997 and March 2004, as well as the Great Northern franchise between April 2004 and March 2006. It was initially owned by Prism Rail, and was subsequently acquired by the British transport conglomerate National Express. The West Anglia Great Northern franchise was created as part of the privatisation of British Rail, the recently founded company Prism Rail successfully bid for it, being awarded a seven year concession for its operation during December 1996. It took over operations from British Rail on 5 January 1997. The company set about overhauling its inherited rolling stock, such as the Class 313 and Class 317 electric multiple units. By 1999, WAGN was amongst the best performing franchises according to statistics compiled by the Office of Passenger Rail Franchising. However, proposed open access services ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potters Bar
Potters Bar is a town in Hertfordshire, England,in the historic County of Middlesex Hertsmere Borough Council – Community Strategy First Review (PDF) north of central London. In 2011, it had a population of 21,882.Neighbourhood Statistics Office for National Statistics 2011 Census. Retrieved 1 June 2013 In the 2021 census, the four wards that make up Potters Bar - Bentley Heath & The Royds, Furzefield, Oakmere and Parkfield - had a combined population of 22,536; this includes several smaller outlying hamlets contained in the Bentley Heath & The Royds ward, such as Bentley Heath and Ganwick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austen Kark
Austen Steven Kark CBE (20 October 1926 – 10 May 2002) was a managing director of the BBC World Service. He was one of three former holders of that post, along with Gerard Mansell and John Tusa, to oppose the plans of John Birt to merge the service into the BBC. After Birt became director general of the BBC in 1992, he had planned to end the service's independent status at Bush House in central London, and absorb it within the rest of the corporation. Kark had a varied career before his tenure with the BBC. He was the son of a London army major who became a publisher. He attended Upper Canada College in Toronto, the Nautical College in Pangbourne, the Royal Naval College, and Magdalen College, Oxford. He became a Royal Navy midshipman in 1944, serving two years with the East Indies fleet, aboard and HMS ''London''. In 1948, at Oxford, Kark directed the first production of Jean-Paul Sartre's '' The Flies''. He later joined his family's magazine business, Norman Kark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electro-pneumatic Brake System On British Railway Trains
The electro-pneumatic brake system on British mainline railway trains was introduced in 1950 and remains the primary braking system for multiple units in service today, although London Transport underground trains had been fitted with EP brakes since the 1920s. The Southern Region of British Railways operated a self-contained fleet of electric multiple units for suburban and middle-distance passenger trains. From 1950, an expansion of the fleet was undertaken and the new build adopted a braking system that was novel in the UK, the electro-pneumatic brake in which compressed air brake operation was controlled electrically by the driver. This was a considerable and successful technical advance, enabling a quicker and more sensitive response to the driver's operation of brake controls. Origins From the 1920s, the Southern Railway of the UK and its predecessor companies had adopted electrification and multiple-unit train operation as a solution for dense and intensive passenger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Debris
Road debris, a form of road hazard, is debris that accumulates on or off a road. Road debris includes substances, materials, and objects that are foreign to the normal roadway environment. Debris may be produced by vehicular or non-vehicular sources, although in all cases it is considered litter, a form of solid waste., AAA Foundation for Traffic Safety press release o"The Safety Impact of Vehicle-Related Road Debris" Gerry Forbes and John Robinson, June 2004 Debris may tend to collect in areas where vehicles do not drive, such as on the edges (shoulder), around traffic islands, and junctions. Road spray or tire kickup is road debris (usually liquid water) that has been kicked up, pushed out, or sprayed out from, a tire. In 2004, a AAA Foundation for Traffic Safety study revealed that vehicle-related road debris caused 25,000 accidents and nearly 100 deaths a year. Causes Road debris can be caused by various factors, including objects falling off vehicles or natural disaster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parapet
A parapet is a barrier that is an upward extension of a wall at the edge of a roof, terrace, balcony, walkway or other structure. The word comes ultimately from the Italian ''parapetto'' (''parare'' 'to cover/defend' and ''petto'' 'chest/breast'). Where extending above a roof, a parapet may simply be the portion of an exterior wall that continues above the edge line of the roof surface, or may be a continuation of a vertical feature beneath the roof such as a fire wall or party wall. Parapets were originally used to defend buildings from military attack, but today they are primarily used as guard rails, to conceal rooftop equipment, reduce wind loads on the roof, and to prevent the spread of fires. Parapet types Parapets may be plain, embattled, perforated or panelled, which are not mutually exclusive terms. *Plain parapets are upward extensions of the wall, sometimes with a coping at the top and corbel below. *Embattled parapets may be panelled, but are pierced, if not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momentum
In Newtonian mechanics, momentum (: momenta or momentums; more specifically linear momentum or translational momentum) is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If is an object's mass and is its velocity (also a vector quantity), then the object's momentum (from Latin '' pellere'' "push, drive") is: \mathbf = m \mathbf. In the International System of Units (SI), the unit of measurement of momentum is the kilogram metre per second (kg⋅m/s), which is dimensionally equivalent to the newton-second. Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force acting on it. Momentum depends on the frame of reference, but in any inertial frame of reference, it is a ''conserved'' quantity, meaning that if a closed system is not affected by external forces, its total momentum does not change. Momentum is also conserved in special relativity (with a mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bogie
A bogie ( ) (or truck in North American English) comprises two or more Wheelset (rail transport), wheelsets (two Railroad wheel, wheels on an axle), in a frame, attached under a vehicle by a pivot. Bogies take various forms in various modes of transport. A bogie may remain normally attached (as on many railroad cars and semi-trailers) or be quickly detachable (as for a dolly (trailer), dolly in a road train or in railway bogie exchange). It may include Suspension (vehicle), suspension components within it (as most rail and trucking bogies do), or be solid and in turn be suspended (as are most bogies of continuous track, tracked vehicles). It may be mounted on a swivel, as traditionally on a railway carriage or locomotive, additionally jointed and sprung (as in the landing gear of an airliner), or held in place by other means (centreless bogies). Although ''bogie'' is the preferred spelling and first-listed variant in various dictionaries, bogey and bogy are also used. Rail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad Switch
A railroad switch (American English, AE), turnout, or (set of) points (Commonwealth English, CE) is a mechanical installation enabling railway trains to be guided from one Rail tracks, track to another, such as at a Junction (rail), railway junction or where a Branch line, spur or Siding (rail), siding branches off. Design The parts of a turnout are known by different names in different jurisdictions. The main terms in U.S. and UK usage are shown in the selectable diagrams. In this article, the U.S. term is listed first and UK second, in parentheses. The most common type of switch consists of a pair of linked tapering rails, known as ''points'' (''switch rails'' or ''point blades''), lying between the diverging outer rails (the ''stock rails''). These points can be moved laterally into one of two positions to direct a train coming from the point blades toward the straight path or the diverging path. A train moving from the narrow end toward the point blades (i.e. it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Multiple Unit
An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages using electricity as the motive power. An EMU requires no separate locomotive, as electric traction motors are incorporated within one or a number of the carriages. An EMU is usually formed of two or more semi-permanently coupled carriages. However, electrically powered single-unit railcars are also generally classed as EMUs. The vast majority of EMUs are passenger trains but versions also exist for carrying mail. EMUs are popular on intercity, commuter, and suburban rail networks around the world due to their fast acceleration and pollution-free operation, and are used on most rapid-transit systems. Being quieter than diesel multiple units (DMUs) and locomotive-hauled trains, EMUs can operate later at night and more frequently without disturbing nearby residents. In addition, tunnel design for EMU trains is simpler as no provision is needed for exhausting fumes, although retrofitting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 365
The British Rail Class 365 ''Networker Express'' dual-voltage ( and 750 V DC) electric multiple unit passenger trains were built by ABB at Holgate Road Carriage Works in 1994 and 1995. The Class 365 was derived from the EMU after the planned "Universal Networker" Classes 371 and 381 were not funded through to production. An initial prototype that better suited the operation of long-distance services was developed from an existing unit (designated as Class 465/3), as the new type was intended to operate services in South East England and on the Great Northern Route. The purchase of 41 Class 365s was authorised in late 1993; they would be the last trains to be built at the Holgate Road works prior to its closure. Due to the front end of refurbished units resembling a smiling face, the trains have been nicknamed "Happy Trains" by enthusiasts. Deliveries began in 1994 under Network SouthEast and continued after operations transferred to the private sector; the final unit was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge
Cambridge ( ) is a List of cities in the United Kingdom, city and non-metropolitan district in the county of Cambridgeshire, England. It is the county town of Cambridgeshire and is located on the River Cam, north of London. As of the 2021 United Kingdom census, the population of the City of Cambridge was 145,700; the population of the wider built-up area (which extends outside the city council area) was 181,137. (2021 census) There is archaeological evidence of settlement in the area as early as the Bronze Age, and Cambridge became an important trading centre during the Roman Britain, Roman and Viking eras. The first Town charter#Municipal charters, town charters were granted in the 12th century, although modern city status was not officially conferred until 1951. The city is well known as the home of the University of Cambridge, which was founded in 1209 and consistently ranks among the best universities in the world. The buildings of the university include King's College Chap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
