Misplaced Pages

#245754

21-573: The Jubilee Parkway is a pair of parallel concrete viaduct bridges that carry Interstate 10 across Mobile Bay from the George Wallace Tunnel on Blakeley Island in Mobile, Alabama eastbound to Spanish Fort / Daphne, Alabama . The bridges are similar in design to the pre- Hurricane Katrina I-10 Twin Span Bridge near New Orleans, Louisiana . Each of the two bridges is two lanes wide, for

42-426: A fuelling point and other minor maintenance facilities. A good example of this was Newport 's Godfrey Road stabling point, which has since been closed. Stabling sidings can be just a few roads or large complexes like Feltham Sidings. They are sometimes electrified with a third rail or OLE . An example of a stabling point with third rail would be Feltham marshalling yard which is being made into carriage sidings for

63-543: A landscape, usually by bridging a river valley or other eroded opening in an otherwise flat area. Often such valleys had roads descending either side (with a small bridge over the river, where necessary) that become inadequate for the traffic load, necessitating a viaduct for "through" traffic. Such bridges also lend themselves for use by rail traffic, which requires straighter and flatter routes. Some viaducts have more than one deck, such that one deck has vehicular traffic and another deck carries rail traffic. One example of this

84-694: A major US coach yard is Sunnyside Yard in New York City , operated by Amtrak . Those that are principally used for storage, such as the West Side Yard in New York, are called "layup yards" or "stabling yards." Coach yards are commonly flat yards because unladen passenger coaches are heavier than unladen freight carriages. In the UK, a stabling point is a place where rail locomotives are parked while awaiting their next turn of duty. A stabling point may be fitted with

105-595: A repurposed rail viaduct provides a garden promenade on top and workspace for artisans below. The garden promenade is called the Coulée verte René-Dumont while the workspaces in the arches below are the Viaduc des Arts . The project was inaugurated in 1993. Manhattan's High Line , inaugurated in 2009, also uses an elevated train line as a linear urban park . In Indonesia viaducts are used for railways in Java and also for highways such as

126-457: A total of four lanes, and 7.5 miles (12.1 km) long. The parkway was completed in 1978 and crosses the northern portion of Mobile Bay, running roughly parallel to the nearby Battleship Parkway , with which it has an interchange. It was named for the jubilee phenomenon that occurs intermittently in Mobile Bay, but is commonly referred to locally and in the media as the " Bayway ". Since 2001,

147-411: A yard, depending on how they are built. For freight cars , the overall yard layout is typically designed around a principal switching (US term) or shunting (UK) technique: In the case of all classification or sorting yards, human intelligence plays a primary role in setting a strategy for the switching operations ; the fewer times coupling operations need to be made and the less distance traveled,

168-617: Is a 19th-century derivation from an analogy with ancient Roman aqueducts . Like the Roman aqueducts , many early viaducts comprised a series of arches of roughly equal length. The longest viaduct in antiquity may have been the Pont Serme which crossed wide marshes in southern France. At its longest point, it measured 2,679 meters with a width of 22 meters. Viaducts are commonly used in many cities that are railroad hubs , such as Chicago, Birmingham, London and Manchester . These viaducts cross

189-468: Is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles. The term viaduct is derived from the Latin via meaning "road", and ducere meaning "to lead". It

210-500: Is built across land rather than water, the space below the arches may be used for businesses such as car parking, vehicle repairs, light industry, bars and nightclubs. In the United Kingdom, many railway lines in urban areas have been constructed on viaducts, and so the infrastructure owner Network Rail has an extensive property portfolio in arches under viaducts. In Berlin the space under the arches of elevated subway lines ( S-Bahn )

231-883: Is the Prince Edward Viaduct in Toronto, Canada, that carries motor traffic on the top deck as Bloor Street , and metro as the Bloor-Danforth subway line on the lower deck, over the steep Don River valley . Others were built to span settled areas, crossing over roads beneath—the reason for many viaducts in London. Viaducts over water make use of islands or successive arches. They are often combined with other types of bridges or tunnels to cross navigable waters as viaduct sections, while less expensive to design and build than tunnels or bridges with larger spans, typically lack sufficient horizontal and vertical clearance for large ships. See

SECTION 10

#1732851064246

252-407: Is used for several different purposes, including small eateries or bars. Elevated expressways were built in major cities such as Boston ( Central Artery ), Los Angeles, San Francisco, Seoul , Tokyo and Toronto ( Gardiner Expressway ). Some were demolished because they were unappealing and divided the city. In other cases, viaducts were demolished because they were structurally unsafe, such as

273-526: The Chesapeake Bay Bridge-Tunnel . The Millau Viaduct is a cable-stayed road-bridge that spans the valley of the river Tarn near Millau in southern France. It opened in 2004 and is the tallest vehicular bridge in the world, with one pier's summit at 343 metres (1,125 ft). The viaduct Danyang–Kunshan Grand Bridge in China was the longest bridge in the world as of 2011 . Where a viaduct

294-629: The Embarcadero Freeway in San Francisco, which was damaged by an earthquake in 1989. However, in developing nations such as Thailand ( Bang Na Expressway , the world's longest road bridge ), India ( Delhi-Gurgaon Expressway ), China, Bangladesh, Pakistan, and Nicaragua, elevated expressways have been built and more are under construction to improve traffic flow, particularly as a workaround of land shortage when built atop surface roads. Other uses have been found for some viaducts. In Paris, France,

315-628: The Jakarta Inner Ring Road . In January 2019, the Alaskan Way Viaduct in Seattle was closed and replaced with a tunnel after several decades of use because it was seismically unsafe. Railroad yard Many yards are located at strategic points on a main line . Main-line yards are often composed of an up yard and a down yard, linked to the associated direction of travel . There are different types of yards, and different parts within

336-615: The Port of Mobile and prevent large cruise ships from accessing the Alabama Cruise Terminal. One of the largest multi-vehicle collisions in U.S. history took place on the Parkway on the morning of March 20, 1995. Caused by fog on Mobile Bay, the accident involved around 200 vehicles, killed one person, and injured more than 90 others. During the ice storm of January 28–30, 2014, the Bayway

357-470: The Alabama Department of Transportation (ALDOT) has planned to expand the parkway to a total of eight lanes in addition to a connecting cable-stayed bridge with a main span 1,250 feet (381 m) long and 190 feet (58 m) high that would bypass the George Wallace Tunnel . This is intended to eliminate the current traffic bottleneck on I-10 at the tunnel, but is very controversial locally due to

378-613: The faster the operation, the better the strategy and the sooner the newly configured consist can be joined to its outbound train.   A large freight yard may include the following components: Freight yards may have multiple industries adjacent to them where railroad cars are loaded or unloaded and then stored before they move on to their new destination. Coach yards (American English) or stabling yards or carriage sidings (British English) are used for sorting, storing and repairing passenger cars . These yards are located in metropolitan areas near large stations or terminals. An example of

399-498: The large railroad yards that are needed for freight trains there, and also cross the multi-track railroad lines that are needed for heavy rail traffic. These viaducts provide grade separation and keep highway and city street traffic from having to be continually interrupted by the train traffic. Likewise, some viaducts carry railroads over large valleys, or they carry railroads over cities with many cross-streets and avenues. Many viaducts over land connect points of similar height in

420-516: The proposed bridge's potential visual and economic impact on the city. The arguments against the bridge have focused on the bridge's height of roughly 500 feet (152 m), taller than any other structure in the city except for the RSA Battle House Tower , as potentially overshadowing the city. The potential economic impact is that, with less than 190 feet (58 m) of clearance under the bridge, it would hamper large ships and projects from

441-519: Was closed several times for hours, diverting traffic onto the Causeway, while ALDOT crews used grading equipment to remove ice from the roadway. Asked why the Bayway wasn't sanded or salted, ALDOT officials said that they did not have the spreader equipment since ice storms occur in the area only about once every 20 years. 30°39′55″N 87°57′49″W  /  30.6652°N 87.9637°W  / 30.6652; -87.9637 Viaduct A viaduct

SECTION 20

#1732851064246
#245754