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Green Track
Green track (also grassed track or lawn track) is a type of railway track in which the track bed and surrounding area are planted with sod, grass turf or other vegetation as ground cover. It is a popular way of making railways more visually appealing, particularly for trams and light rail, and providing additional urban green space. Aside from the visual improvement, the vegetation provides a number of positive effects, such as noise control, noise reduction, less air pollution, Surface runoff, rainwater runoff mitigation, and reduced urban heat island, urban heat island effect. History The first green tracks were installed in 1905 along in Berlin. Due to the technical challenges they posed, many green tracks were phased out in the following decades, but beginning in the mid-1980s, green tracks have seen a resurgence. Impact Green tracks have a number of positive impacts on the urban environment. Green tracks reduce surface runoff by retaining an estimated 50-70% of the precipit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Association Of City Transportation Officials
The National Association of City Transportation Officials (NACTO) is a coalition of the Departments of Transportation in North American cities. Founded in 1996, NACTO has participated in a number of research initiatives dealing with surface transportation in urban areas. Past campaigns have focused on bicycling, bus rapid transit, light rail, bike share, and freight. Its design guides have gained the endorsement of numerous cities, states, and other organizations, in addition to gaining FHWA acceptance for use in conjunction with other mandated guidance and resources. NACTO is headquartered in New York City. Designing Cities Conference Since 2012, NACTO has held an annual Designing Cities Conference, convening hundreds of "transportation leaders and practitioners from across the country to discuss key trends in urban street design and transportation policy." Conference sites *2012: New York City *2013: Phoenix *2014: San Francisco *2015: Austin *2016: Seattle *2017: Chicag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track Ballast
Track ballast forms the trackbed upon which railroad ties (sleepers) are laid. It is packed between, below, and around the ties. It is used to bear the load from the railroad ties, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. Ballast also holds the track in place as the trains roll over it. A variety of materials have been used as track ballast, including crushed stone, washed gravel, bank run (unwashed) gravel, torpedo gravel (a mixture of coarse sand and small gravel), slag, chats, coal cinders, sand, and burnt clay. The term "ballast" comes from a nautical term for the stones used to stabilize a ship. Construction The appropriate thickness of a layer of track ballast depends on the size and spacing of the ties, the amount of traffic on the line, and various other factors. Track ballast should never be laid down less than thick, and high-speed railway lines may require ballast up to thick.Bell 2004, p. 39 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2206 Amsterdamer Straße, Gürtel
6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number. In mathematics Six is the smallest positive integer which is neither a square number nor a prime number; it is the second smallest composite number, behind 4; its proper divisors are , and . Since 6 equals the sum of its proper divisors, it is a perfect number; 6 is the smallest of the perfect numbers. It is also the smallest Granville number, or \mathcal-perfect number. As a perfect number: *6 is related to the Mersenne prime 3, since . (The next perfect number is 28.) *6 is the only even perfect number that is not the sum of successive odd cubes. *6 is the root of the 6-aliquot tree, and is itself the aliquot sum of only one other number; the square number, . Six is the only number that is both the sum and the product of three consecutive positive numbers. Unrelated to 6's being a perfect number, a Golomb ruler of length 6 is a "perfect ruler". Six is a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
12 299 Zwickauer Straße
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Moisture
Soil moisture is the water content of the soil. It can be expressed in terms of volume or weight. Soil moisture measurement can be based on ''in situ'' probes (e.g., capacitance probes, neutron probes) or remote sensing methods. Water that enters a field is removed from a field by runoff, drainage, evaporation or transpiration. Runoff is the water that flows on the surface to the edge of the field; drainage is the water that flows through the soil downward or toward the edge of the field underground; evaporative water loss from a field is that part of the water that evaporates into the atmosphere directly from the field's surface; transpiration is the loss of water from the field by its evaporation from the plant itself. Water affects soil formation, structure, stability and erosion but is of primary concern with respect to plant growth. Water is essential to plants for four reasons: # It constitutes 80%-95% of the plant's protoplasm. # It is essential for photosynthesis. # It i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track (rail Transport)
A railway track (British English and UIC terminology) or railroad track (American English), also known as permanent way or simply track, is the structure on a railway or railroad consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable surface for their wheels to roll upon. Early tracks were constructed with wooden or cast iron rails, and wooden or stone sleepers; since the 1870s, rails have almost universally been made from steel. Historical development The first railway in Britain was the Wollaton Wagonway, built in 1603 between Wollaton and Strelley in Nottinghamshire. It used wooden rails and was the first of around 50 wooden-railed tramways built over the next 164 years. These early wooden tramways typically used rails of oak or beech, attached to wooden sleepers with iron or wooden nails. Gravel or small stones were packed around the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fill Dirt
Fill dirt (also called cleanfill, or just fill) is earthy material which is used to ''fill in'' a depression or hole in the ground or create mounds or otherwise artificially change the grade or elevation of real property. , retrieved on 2008-11-12. Fill dirt is usually (soil from beneath ) and underlying soil which has little |
Concrete Sleeper
A concrete sleeper (British English) or concrete tie (American English) is a type of railway sleeper or railroad tie made out of steel reinforced concrete. History In 1877, Joseph Monier, a French gardener, suggested that concrete reinforced with steel could be used for making sleepers for railway track. Monier designed a sleeper and obtained a patent for it, but it was not successful. Concrete sleepers were first used on the Alford and Sutton Tramway in 1884. Their first use on a main line railway was by the Reading Company in America in 1896, as recorded by AREA Proceedings at the time. Designs were further developed and the railways of Austria and Italy used the first concrete sleepers around the turn of the 20th century. This was closely followed by other European railways. Major progress was not achieved until World War II, when the timbers used for sleepers were scarce due to competition from other uses, such as mines.Hay 1982, p. 470 Following research carried out on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tramway Track
Tramway track is used on tramways or light rail operations. Grooved rails (or girder rails) are often used to provide a protective flangeway in the trackwork in city streets. Like standard rail tracks, tram tracks consist of two parallel steel rails. Tram rails can be placed on several surfaces, such as with standard rails on sleepers like railway tracks, or with grooved rails on concrete sleepers into street surfaces ( pavement) for street running. Tram rails in street have the disadvantage that they pose a risk to cyclists. An alternative is to lay tracks into non-road grass turf surfaces; this is known as ''grassed track'' (or ''track in a lawn''), introduced in Liverpool in 1924 - although grassed track is common in rural tramways. History Tramway tracks have been in existence since the mid-16th century. They were previously made of wood, but during the late 18th century iron and later steel came into use prominently. The first street tramways were laid in 1832 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combino Trams In Nordhausen - 2015
The Siemens Combino is a low-floor tram produced by Siemens Mobility (formerly Duewag). The first prototype was produced in 1996 at the Duewag works in Düsseldorf; the trams are now made in Krefeld- Uerdingen. Due to its modular design using standardised components, and the resulting reduced costs, the Combino was for a time one of the most successful tram types. They were sold to 12 jurisdictions and a further development was sold to two others. In 2007, a new generation of Combinos was sold to Bern and was known as the Siemens Combino XL. This was an updated version of the original design and was intended to correct defects in the original design. Subsequently, the model was again renamed and is now known as the Avenio M. 14 of these were produced in 2011 with 12 going to Erfurt and two to Nordhausen. The Siemens line has been complemented by a new design of trams called the Avenio, which have been built on the design technology of Siemens Combino Plus in Sul de Tejo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dresden
Dresden (, ; Upper Saxon: ''Dräsdn''; wen, label=Upper Sorbian, Drježdźany) is the capital city of the German state of Saxony and its second most populous city, after Leipzig. It is the 12th most populous city of Germany, the fourth largest by area (after Berlin, Hamburg and Cologne), and the third most populous city in the area of former East Germany, after Berlin and Leipzig. Dresden's urban area comprises the towns of Freital, Pirna, Radebeul, Meissen, Coswig, Radeberg and Heidenau and has around 790,000 inhabitants. The Dresden metropolitan area has approximately 1.34 million inhabitants. Dresden is the second largest city on the River Elbe after Hamburg. Most of the city's population lives in the Elbe Valley, but a large, albeit very sparsely populated area of the city east of the Elbe lies in the West Lusatian Hill Country and Uplands (the westernmost part of the Sudetes) and thus in Lusatia. Many boroughs west of the Elbe lie in the foreland of the Ore Mounta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
