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Adverse Camber
The cant of a railway track or camber of a road (also referred to as superelevation, cross slope or cross fall) is the rate of change in elevation (height) between the two rails or edges. This is normally greater where the railway or road is curved; raising the outer rail or the outer edge of the road creates a banked turn, thus allowing vehicles to maneuver through the curve at higher speeds than would otherwise be possible were the surface flat or level. Rail On railways, cant helps a train steer around a curve, keeping the wheel flanges from touching the rails, minimizing friction, wear and rail squeal. The main functions of cant are the following: * Improve distribution of the load across both rails * Reduce wear on rails and wheels * Neutralize the effect of lateral forces * Improve passenger comfort The necessary cant in a curve depends on the expected speed of the trains and the radius. However, it may be necessary to select a compromise value at design time, for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track Cycling 2005
Track or Tracks may refer to: Routes or imprints * Ancient trackway, any track or trail whose origin is lost in antiquity * Animal track, imprints left on surfaces that an animal walks across * Desire path, a line worn by people taking the shortest/most convenient route across fields, parks or woods * Forest track, a track (unpaved road) or trail through a forest * Fossil trackway, a type of trace fossil, usually preserving a line of animal footprints * Trackway, an ancient route of travel or track used by animals * Trail * Vineyard track, a land estate (defined by law) meant for the growing of vine grapes Arts, entertainment, and media Films * ''Tracks'' (1976 film), an American film starring Dennis Hopper * ''Tracks'' (2003 film), a 2003 animated short film * ''Tracks'' (2013 film), an Australian film starring Mia Wasikowska * ''The Track'' (film), a 1975 French thriller–drama film Literature * ''Tracks'' (novel), written by Native American author Louise Erdrich * ''Trac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad Tie
A railroad tie, crosstie (American English), railway tie (Canadian English) or railway sleeper (Australian and British English) is a rectangular support for the 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 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; 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, azobé (red ironwood) and plastic composite. Tie spacing may depend on the type of tie, traffic loads and other requirements, for example 2640 concrete ties per mile on North American mainline railroads to 2112 timber ties per mile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Design Speed
The design speed is a tool used to determine geometric features of a new road or street during road design. Contrary to the word's implication, the design speed of the road or street is not necessarily its vehicle speed limit or maximum safe speed; that can be higher or lower. Choosing a design speed means finding a balance between several interests which compete for priority, such high vehicle speeds to allow driving, drivers to travel to their destinations quickly versus low vehicle speeds for the road traffic safety, safety of people outside the vehicle (such as pedestrians and cyclists), or traffic flow, quick movement of rush hour, peak traffic (Traffic engineering (transportation), traffic engineering) versus maximising the economic development potential of the street (urban planning). Geometric features The design speed chosen for a high-speed roadway is a major factor in choosing cant (road/rail), superelevation rates and radii of road curve, curves, stopping sight di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rain
Rain is water droplets that have condensed from atmospheric water vapor and then fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water for hydroelectric power plants, crop irrigation, and suitable conditions for many types of ecosystems. The major cause of rain production is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts. If enough moisture and upward motion is present, precipitation falls from convective clouds (those with strong upward vertical motion) such as cumulonimbus (thunder clouds) which can organize into narrow rainbands. In mountainous areas, heavy precipitation is possible where upslope flow is maximized within windward sides of the terrain at elevation which forces moist air to condense and fall out as rainfall along the sides of mountains. On the leeward side of mountains, desert climates can exi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Civil Engineering
Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including public works such as roads, bridges, canals, dams, airports, sewage systems, pipelines, structural components of buildings, and railways. Civil engineering is traditionally broken into a number of sub-disciplines. It is considered the second-oldest engineering discipline after military engineering, and it is defined to distinguish non-military engineering from military engineering. Civil engineering can take place in the public sector from municipal public works departments through to federal government agencies, and in the private sector from locally based firms to global Fortune 500 companies. History Civil engineering as a discipline Civil engineering is the application of physical and scientific principles for solving the problems of society, and its history is intricately linked to advances in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellerker Ave, Doncaster - From The Ground
Ellerker is a village and civil parish in the East Riding of Yorkshire, England. It is situated approximately west of Hull city centre and east of the market town of Howden. It lies south of the A63 road junction with the A1034 road. According to the 2011 UK Census, Ellerker parish had a population of 307, a decrease on the 2001 UK Census figure of 320. Ellerker lies within the Parliamentary constituency of Haltemprice and Howden an area that mainly consists of middle class suburbs, towns and villages. The area is affluent and has one of the highest proportions of owner-occupiers in the country. 'Ellerker' means a "marsh where alder trees grow", from Old English ''alor'' or ''aler'' "alder" and Old Norse ''kjarr'' "marsh". The name was recorded as ''Alrecher'' in the 11th century and ''Alekirr'' in 1139. Same name as Orcher (Normandy, ''Aurichier'' 12th century). In 1823 Ellerker was in the parish of Brantingham and the Wapentake of Howdenshire. Village population w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Queenslander
''The Queenslander'' was the weekly summary and literary edition of the '' Brisbane Courier'', the leading journal in the colony—and later, federal state—of Queensland since the 1850s. ''The Queenslander'' was launched by the Brisbane Newspaper Company in 1866, and discontinued in 1939. History ''The Queenslander'' was first published on 3 February 1866 in Brisbane by Thomas Blacket Stephens. The last edition was printed on 22 February 1939. In a country the size of Australia, a daily newspaper of some prominence could only reach the bush and outlying districts if it also published a weekly edition. Yet ''The Queenslander'', under the managing editorship of Gresley Lukin—managing editor from November 1873 until December 1880—also came to find additional use as a literary magazine. In September 1919, a series of aerial photographs of Brisbane and its surrounding suburbs were published under the title, ''Brisbane By Air''. The photographs were taken by the newspaper' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Rail Track Corporation
The Australian Rail Track Corporation (ARTC) is an Australian Government-owned statutory corporation. It operates one of the largest rail networks in the nation spanning 8,500km across five states, 39 worksites and more than 50 First Nations. ARTC continues to expand the network through major infrastructure projects including Inland Rail, which is a new 1,700km freight line between Melbourne and Brisbane via regional Victoria, NSW and Queensland that will complete Australia’s national freight network and better connect producers to markets. History In November 1996, the Australian Government announced a major rail reform package that included the sale of government-owned train operators Australian National and National Rail, and the establishment of ARTC to manage the sections of the interstate rail network which had been controlled by the two former organisations. ARTC was incorporated in February 1998, with operations starting in July 1998 when the lines managed by Austra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degree Of Curvature
Degree of curve or degree of curvature is a measure of curvature of a circular arc used in civil engineering for its easy use in layout surveying. Definition The degree of curvature is defined as the central angle to the ends of an agreed length of either an arc or a chord; various lengths are commonly used in different areas of practice. This angle is also the change in forward direction as that portion of the curve is traveled. In an ''n''-degree curve, the forward bearing changes by ''n'' degrees over the standard length of arc or chord. Usage Curvature is usually measured in radius of curvature. A small circle can be easily laid out by just using radius of curvature, but degree of curvature is more convenient for calculating and laying out the curve if the radius is large as a kilometer or a mile, as it needed for large scale works like roads and railroads. By using degrees of curvature, curve setting can be easily done with the help of a transit or theodolite and a chai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilting Train
A tilting train is a train that has a mechanism enabling increased speed on regular rail tracks. As a train (or other vehicle) rounds a curve at speed, objects inside the train experience centrifugal force. This can cause packages to slide about or seated passengers to feel squashed by the outboard armrest, and standing passengers to lose their balance. Tilting trains are designed to counteract this by tilting the carriages towards the inside of the curve, thus compensating for the g-force. The train may be constructed such that inertial forces cause the tilting (''passive tilt''), or it may have a computer-controlled powered mechanism (''active tilt''). The first passive tilting car design was built in the US in 1937, and an improved version was built in 1939. The beginning of World War II ended development. Talgo introduced a version based on their articulated bogie design in 1950s, and this concept was used on a number of commercial services. Among these was the UAC Turbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cant Deficiency
The term "cant deficiency" is defined in the context of travel of a rail transport, rail vehicle at constant speed on a constant radius curve. Cant (road/rail), Cant itself is a British synonym for the superelevation of the curve, that is, the elevation of the outside rail minus the elevation of the inside rail. Cant deficiency is present when a vehicle's speed on a curve is greater than the speed at which the components of Wheel-rail interface, wheel to rail force are normal to the plane of the track. In that case, the resultant force (aggregated force of gravitational force and centrifugal force) exerts the outside rail more than the inside rails, in which it creates lateral acceleration toward outside of the curve. In order to reduce cant deficiency, the speed can be reduced or the superelevation can be increased. The amount of cant deficiency is expressed in term of required superelevation to be added in order to bring the resultant force into balance between the two rails. In th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Gauge
A standard-gauge railway is a railway with a track gauge of . The standard gauge is also called Stephenson gauge (after George Stephenson), International gauge, UIC gauge, uniform gauge, normal gauge and European gauge in Europe, and SGR in East Africa. It is the most widely used track gauge around the world, with approximately 55% of the lines in the world using it. All high-speed rail lines use standard gauge except those in Russia, Finland, and Uzbekistan. The distance between the inside edges of the rails is defined to be 1435 mm except in the United States and on some heritage British lines, where it is defined in U.S. customary/Imperial units as exactly "four feet eight and one half inches" which is equivalent to 1435.1mm. History As railways developed and expanded, one of the key issues was the track gauge (the distance, or width, between the inner sides of the rails) to be used. Different railways used different gauges, and where rails of different gauge met – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
