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Alexandria Extension
The Alexandria Extension is a short rail line in Washington, D.C. and Prince George's County, Maryland. Its northern portion connects the Capital Subdivision to the RF&P Subdivision, allowing freight trains to avoid Downtown Washington. Its southern portion, the Shepherd Industrial Spur, extends south to Shepherds Landing, directly across the Potomac River from Alexandria, Virginia; service on this portion ended in 2001. It is currently part of CSX Transportation's Capital Subdivision. Route description The Alexandria Extension runs south 7.2 miles (11.6 km) from a junction in Hyattsville, Maryland to the beginning of the RF&P Subdivision just before the Anacostia Railroad Bridge in Southeast D.C. This busy route is used by freight trains to Virginia. This portion runs parallel to Benning Yard, the Landover Subdivision, the Washington Metro Orange Line, and the Anacostia Freeway for roughly the southern half of its length. Its southern portion, the Shepherd Indus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexandria Extension Bridge 2021
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandria grew rapidly and became a major centre of Hellenic civilisation, eventually replacing Memphis, in present-day Greater Cairo, as Egypt's capital. During the Hellenistic period, it was home to the Lighthouse of Alexandria, which ranked among the Seven Wonders of the Ancient World, as well as the storied Library of Alexandria. Today, the library is reincarnated in the disc-shaped, ultramodern Bibliotheca Alexandrina. Its 15th-century seafront Qaitbay Citadel is now a museum. Called the "Bride of the Mediterranean" by locals, Alexandria is a popular tourist destination and an important industrial centre due to its natural gas and oil pipelines from Suez. The city extends about along the northern coast of Egypt, and is the largest city on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Naval Research Laboratory
The United States Naval Research Laboratory (NRL) is the corporate research laboratory for the United States Navy and the United States Marine Corps. It was founded in 1923 and conducts basic scientific research, applied research, technological development and prototyping. The laboratory's specialties include plasma physics, space physics, materials science, and tactical electronic warfare. NRL is one of the first US government scientific R&D laboratories, having opened in 1923 at the instigation of Thomas Edison, and is currently under the Office of Naval Research. As of 2016, NRL was a Navy Working Capital Fund activity, which means it is not a line-item in the US Federal Budget. Instead of direct funding from Congress, all costs, including overhead, were recovered through sponsor-funded research projects. NRL's research expenditures were approximately $1 billion per year. Research The Naval Research Laboratory conducts a wide variety of basic research and applied r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DC Streetcar
The DC Streetcar is a surface streetcar network in Washington, D.C. , it consists of only one line: a segment running in mixed traffic along H Street and Benning Road in the city's Northeast quadrant. The streetcars are the first to run in the District of Columbia since the dismantling of the previous streetcar system in 1962. The District of Columbia began laying track in 2009, for two lines whose locations in Anacostia and Benning were chosen to revitalize blighted commercial corridors. The system is owned by the District of Columbia Department of Transportation (DDOT); the RATP Dev USA, the US arm of the French transportation company, RATP Dev, has been operating and managing the streetcar since its inception. The system's H Street/Benning Road Line began public service on February 27, 2016. In , the line had a ridership of . Development First iteration of streetcars Between 1862 and 1962, streetcars in Washington, D.C., were a common mode of transportation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anacostia Line
The Anacostia Line is a partially constructed line of the DC Streetcar, never put into service, intended to connect the Anacostia neighborhood with Joint Base Anacostia–Bolling. Construction occurred in 2009 and 2010, but was terminated before the line was complete. History First line proposal The D.C. City Council approved an expenditure of $310 million for the streetcar project in September 2002.Layton, Lyndsey. "Light-Rail Project Would Link Anacostia With Southwest D.C." ''Washington Post.'' September 19, 2002. The first line to be built would be a "starter" streetcar line in Anacostia. The goal of the project was to bring light rail to Anacostia first (rather than last, as had happened with Metrorail), and to provide a speedier, more cost-effective way to link the neighborhood with the rest of the city. Initially, the line was planned to run along the abandoned CSX railway tracks (known as the Shepherd Industrial Spur) from the Minnesota Avenue Metro station to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolling Air Force Base
Bolling Air Force Base or Bolling AFB was a United States Air Force base in Washington, D.C. In 2010, it was merged with Naval Support Facility Anacostia to form Joint Base Anacostia–Bolling. From its beginning, the installation has hosted elements of the Army Air Corps (predecessor to today's Air Force) and Navy aviation and support elements. History Before European colonization, the area where Bolling Air Force Base is located was inhabited by the Nacotchtank, an Algonquian people. The largest village of the Nacotchtank was located just north of the air force base, south of Anacostia Park. Another Nacotchtank village is believed to have existed on the base grounds, where two ossuaries (burial mounds) were discovered in 1936. Other Nacotchtank archaeological sites have been found at Giesboro Point on the Potomac River. The Department of Defense (DOD) has owned the Bolling grounds since 1917, when the tract of land was scouted by William C. Ocker at the direction of Gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail Spur
A branch line is a phrase used in railway terminology to denote a secondary railway line which branches off a more important through route, usually a main line. A very short branch line may be called a spur line. Industrial spur An industrial spur is a type of secondary track used by railroads to allow customers at a location to load and unload railcars without interfering with other railroad operations. Industrial spurs can vary greatly in length and railcar capacity depending on the requirements of the customer the spur is serving. In heavily industrialized areas, it is not uncommon for one industrial spur to have multiple sidings to several different customers. Typically, spurs are serviced by local trains responsible for collecting small numbers of railcars and delivering them to a larger yard, where these railcars are sorted and dispatched in larger trains with other cars destined to similar locations. Because industrial spurs generally have less capacity and traffic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies of World War II, Allies and the Axis powers. World War II was a total war that directly involved more than 100 million Military personnel, personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Air warfare of World War II, Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the Atomic bombings of Hiroshima and Nagasaki, only two nuclear weapons ever used in war. World War II was by far the List of wars by death toll, deadliest conflict in hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trackage Rights
Railway companies can interact with and control others in many ways. These relationships can be complicated by bankruptcies. Operating Often, when a railroad first opens, it is only a short spur of a main line. The owner of the spur line may contract with the owner of the main line for operation of the contractee's trains, either as a separate line or as a branch with through service. This agreement may continue as the former railroad expands, or it may be temporary until the line is completed. If the operating company goes bankrupt, the contract ends, and the operated company must operate itself. Leasing A major railroad may lease a connecting line from another company, usually the latter company's full system. A typical lease results in the former railroad (the lessee) paying the latter company (the lessor) a certain yearly rate, based on maintenance, profit, or overhead, in order to have full control of the lessor's lines, including operation. If the lessee goes bankrupt, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interlocking Tower
On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over the correct route and to the proper timetable. Signalling control was originally exercised via a decentralised network of control points that were known by a variety of names including signal box (International and British), interlocking tower (North America) and signal cabin (some railways e.g., GCR). Currently these decentralised systems are being consolidated into wide scale signalling centres or dispatch offices. Whatever the form, signalling control provides an interface between the human signal operator and the lineside signalling equipment. The technical apparatus used to control switches (points), signals and block systems is called interlocking. History Originally, all signaling was done by mechanical means. Points and signals were operated locally from individua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freight Car
A railroad car, railcar ( American and Canadian English), railway wagon, railway carriage, railway truck, railwagon, railcarriage or railtruck (British English and UIC), also called a train car, train wagon, train carriage or train truck, is a vehicle used for the carrying of cargo or passengers on a rail transport system (a railroad/railway). Such cars, when coupled together and hauled by one or more locomotives, form a train. Alternatively, some passenger cars are self-propelled in which case they may be either single railcars or make up multiple units. The term "car" is commonly used by itself in American English when a rail context is implicit. Indian English sometimes uses "bogie" in the same manner, though the term has other meanings in other variants of English. In American English, "railcar" is a generic term for a railway vehicle; in other countries "railcar" refers specifically to a self-propelled, powered, railway vehicle. Although some cars exist for the railr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Car Float
A railroad car float or rail barge is a specialised form of lighter with railway tracks mounted on its deck used to move rolling stock across water obstacles, or to locations they could not otherwise go. An unpowered barge, it is towed by a tugboat or pushed by a towboat. This is distinguished from a train ferry, which is self-powered. Historical operations U.S. East Coast During the American Civil War, Civil War, Union general Herman Haupt, a civil engineer, used huge barges fitted with tracks to enable military trains to cross the Rappahannock River in support of the Army of the Potomac. Beginning in the 1830s, the Baltimore and Ohio Railroad (B&O) operated Capital Subdivision#Alexandria Division, a car float across the Potomac River, just south of Washington, D.C., between Shepherds Landing on the east shore, and Alexandria, Virginia on the west. The ferry operation ended in 1906. The B&O operated a car float across the Baltimore Inner Harbor until the mid-1890 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Railroad
The Pennsylvania Railroad (reporting mark PRR), legal name The Pennsylvania Railroad Company also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. It was named for the commonwealth in which it was established. By 1882, Pennsylvania Railroad had become the largest railroad (by traffic and revenue), the largest transportation enterprise, and the largest corporation in the world. Its budget was second only to the U.S. government. Over the years, it acquired, merged with, or owned part of at least 800 other rail lines and companies. At the end of 1926, it operated of rail line;This mileage includes companies independently operated. PRR miles of all tracks, which includes first (or main), second, third, fourth, and sidings, totalled 28,040.49 at the end of 1926. in the 1920s, it carried nearly three times the traffic as other railroads of comparable length, such as the Union Pacific and Atchison, T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
