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| A '''common utility duct''', sometimes called a common utility conduit, is any structure - above, on, or below ground - that carries more than two types of ] lines. However, the phrase often refers specifically to ]s.<ref></ref> | |||
| ==Advantages of common utility ducts== | |||
| The advantages of such facilities are the reduction of maintenance ]s, one-time relocation, and less ] and repair, compared to separate cable ducts for each service. One of the greatest advantages is ]. When ]s are underground, regardless of whether the ducts are common or separate, they prevent downed utilities from blocking ]s, thus speeding ] access after major ]s like ]s, ]s, and ]s. When they are well ]ped they also allow rapid access to all utilities without having to dig access trenches or resort to confused and often inaccurate utility maps. | |||
| ==Examples of common utility ducts== | |||
| Many examples of common utility ducts are found in ], where government officials have sought ways to reduce the catastrophic effects of earthquakes in their ] country. Their use, however, is not limited to that country and there are many examples of such common utility ducts. These include: | |||
| *Incorporated with Xinyi<ref></ref> and Sonshan MRT] lines in ] | |||
| *Azabu-Hibiya Common Utility Duct in ]<ref></ref> | |||
| *Minatomirai District lines in ]<ref> | |||
| </ref> | |||
| *] Village in ], ]' ] in ] incorporates common utility ducts<ref>Mitchell, Sandy. "Prince Charles is not your typical radical." National Geographic. May 2006. Accessed online 9/14/06</ref> | |||
| *"]" in Disney theme parks | |||
| * German cities such as Bremen. This city has near perfect surfaces on its roadways, cycleways and streets. Virtually no repairs or disturbances are visible. The number of streetworks in progress is trivial. This can only be achieved by (a) vehicles not driving on footways or cycleways (b) utility ducts making it unnecessary to disturb the surfaces in order to access the networks below for repairs, maintenance and alterations. Utility networks are housed in a cluster of pipes which are located under footways and cycleways. | |||
| ==See also== | |||
| *] | |||
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| *] | |||
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| ==References== | |||
| <references/> | |||
| ] | |||
| ] | |||
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