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Third-rail
A third rail, also known as a live rail, electric rail or conductor rail, is a method of providing electric power to a railway locomotive or train, through a semi-continuous rigid conductor placed alongside or between the rails of a railway track. It is used typically in a mass transit or rapid transit system, which has alignments in its own corridors, fully or almost fully segregated from the outside environment. Third rail systems are usually supplied from direct current electricity. Modern tram systems, street-running, avoid the risk of electrocution by the exposed electric rail by implementing a segmented ground-level power supply, where each segment is electrified only while covered by a vehicle which is using its power. The third-rail system of electrification is not related to the third rail used in dual gauge railways. Description Third-rail systems are a means of providing electric traction power to trains using an additional rail (called a "conductor rail") ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Ground-level Power Supply
Ground-level power supply, also known as surface current collection or, in French, ''alimentation par le sol'' ("feeding via the ground"), is a concept and group of technologies whereby electric vehicles collect electric power at ground level from individually-powered segments instead of the more common overhead lines. Ground-level power supply has been used primarily for aesthetic reasons. During the late 2010s it has become more economical than overhead lines. Ground-level power supply systems date back to the beginning of Tram#Electric, electric tramways, with some of the earliest such systems using #Early systems, conduit current collection. Since the turn of the 21st century, new systems such as the #Alstom APS, Alstom APS, #Ansaldo Tramwave, Ansaldo Tramwave, #CAF ACR, CAF ACR, #Elways, Elways, and others have been introduced which use modern technology to address some of the limitations and dangers of the older systems, and supply power for buses, trucks, and electric cars. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Locomotive
A locomotive or engine is a rail transport vehicle that provides the motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, motor coach, railcar or power car; the use of these self-propelled vehicles is increasingly common for passenger trains, but rare for freight (see CargoSprinter). Traditionally, locomotives pulled trains from the front. However, push-pull operation has become common, where the train may have a locomotive (or locomotives) at the front, at the rear, or at each end. Most recently railroads have begun adopting DPU or distributed power. The front may have one or two locomotives followed by a mid-train locomotive that is controlled remotely from the lead unit. __TOC__ Etymology The word ''locomotive'' originates from the Latin 'from a place', ablative of 'place', and the Medieval Latin 'causing motion', and is a shortened form of the term ''locomotive engine'', which was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Rapid Transit
Rapid transit or mass rapid transit (MRT), also known as heavy rail or metro, is a type of high-capacity public transport generally found in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be called a subway, tube, or underground. Unlike buses or trams, rapid transit systems are railways (usually electric railway, electric) that operate on an exclusive right-of-way (transportation), right-of-way, which cannot be accessed by pedestrians or other vehicles, and which is often grade-separated in tunnels or on elevated railways. Modern services on rapid transit systems are provided on designated lines between rapid transit station, stations typically using electric multiple units on rail tracks, although some systems use guided rubber tires, magnetic levitation (''maglev''), or monorail. The stations typically have high platforms, without steps inside the trains, requiring custom-made trains in order to minimize gaps between train a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Line 1 Yonge–University
Line 1 Yonge–University is a rapid transit line on the Toronto subway. It serves Toronto and the neighbouring city of Vaughan in Ontario, Canada. It is operated by the Toronto Transit Commission, has 38 stations and is in length, making it the longest line on the subway system. It opened as the "Yonge subway" in 1954 as Canada's first underground passenger rail line, and was extended multiple times between 1963 and 2017. Averaging over 790,000 riders per weekday, Line 1 is the busiest rapid transit line in Canada, and one of the busiest lines in North America. Route description The line forms a rough 'U' shape, with two portions running generally north–south that meet at in the southern part of the city's downtown, and then gradually spreading farther apart as they proceed northward. From Union station, the eastern portion of the line runs straight under or nearby Yonge Street, sometimes in an uncovered trench, for to its northeastern terminus at Finch Avenue, connecting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Coverboard
A plank is timber that is flat, elongated, and rectangular with parallel faces that are higher and longer than wide. Used primarily in carpentry, planks are critical in the construction of ships, houses, bridges, and many other structures. Planks also serve as supports to form shelves and tables. Usually made from sawed timber, planks are usually more than thick, and are generally wider than . In the United States, planks can be any length and are generally a minimum of deep by wide, but planks that are by and by are more commonly stocked by lumber retailers. Planks are often used as a work surface on elevated scaffolding, and need to be wide enough to provide strength without breaking when walked on. The wood is categorized as a board if its width is less than , and its thickness is less than . A plank used in a building as a horizontal supporting member that runs between foundations, walls, or beams to support a ceiling or floor is called a joist. The plank was the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Electricity
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Railroad Tie
A railroad tie, crosstie (American English), railway tie (Canadian English) or railway sleeper (Australian English, Australian and British English) is a rectangular support for the Track (rail transport), rails in railroad tracks. Generally laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade, hold the rails upright and keep them spaced to the correct rail gauge, gauge. Railroad ties are traditionally made of wood, but prestressed concrete is now also widely used, especially in Europe and Asia. Steel ties are common on secondary lines in the UK; Composite lumber, plastic composite ties are also employed, although far less than wood or concrete. As of January 2008, the approximate market share in North America for traditional and wood ties was 91.5%, the remainder being concrete, steel, Lophira alata, azobé (red ironwood) and plastic composite. Tie spacing may depend on the type of tie, traffic loads and other requirements, for example 2640 co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Hugh Llewelyn 442 442 (6620468847)
Hugh may refer to: *Hugh (given name) Noblemen and clergy French * Hugh the Great (died 956), Duke of the Franks * Hugh Magnus of France (1007–1025), co-King of France under his father, Robert II * Hugh, Duke of Alsace (died 895), modern-day France * Hugh of Austrasia (7th century), Mayor of the Palace of Austrasia * Hugh I, Count of Angoulême (1183–1249) * Hugh II, Count of Angoulême (1221–1250) * Hugh III, Count of Angoulême (13th century) * Hugh IV, Count of Angoulême (1259–1303) * Hugh, Bishop of Avranches (11th century), France * Hugh I, Count of Blois (died 1248) * Hugh II, Count of Blois (died 1307) * Hugh of Brienne (1240–1296), Count of the medieval French County of Brienne * Hugh, Duke of Burgundy (d. 952) * Hugh I, Duke of Burgundy (1057–1093) * Hugh II, Duke of Burgundy (1084–1143) * Hugh III, Duke of Burgundy (1142–1192) * Hugh IV, Duke of Burgundy (1213–1272) * Hugh V, Duke of Burgundy (1294–1315) * Hugh Capet (939–996), King of France * Hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Toronto Subway
The Toronto subway is a rapid transit system serving Toronto and the neighbouring city of Vaughan in Ontario, Canada, operated by the Toronto Transit Commission (TTC). It is a multimodal rail network consisting of three heavy-capacity rail lines operating predominantly underground, and one elevated medium-capacity rail line. three new lines are under construction, two light rail lines and one light metro line. In 1954, the TTC opened Canada's first underground rail line, then known as the "Yonge subway", under Yonge Street between Union Station and Eglinton Avenue with 12 stations. As of 2018, the network encompasses 75 stations and of route. In , the system had a ridership of , or about per weekday as of , making it the busiest rapid transit system in Canada in terms of ridership. Overview There are four operating rapid transit lines in Toronto: * Line 1 Yonge–University is the longest and busiest rapid transit line in the system. It opened as the Yonge subway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Crossover (rail)
A railroad switch (), turnout, or ''set ofpoints () is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. 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 will be directed to one of the two paths, depending on the position of the points) is said to be executing a ''facing-point movement''. For many types of switch, a train coming from either of the converging directions will pass through the switch regardless of the position of the points, as the vehicle's wheels will force the points to move. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |