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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 | |||
| ==See also== | |||
| *] | |||
| *] | |||
| *] | |||
| *] | |||
| *] | |||
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| ==References== | |||
| <references/> | |||
| ] | |||
| ] | |||
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