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| A '''common utility duct''' is any structure--above, on, or below ground--which carries more than two types of ] lines. However, the phrase often refers to ]s.{{ref|def}} | |||
| ==Advantages of common utility ducts== | |||
| The advantages of such facilities are the reduction of maintenance ]s, one-time relocation, and less ] and repair. One of the greatest advantages is ]. Common utility ducts prevent downed ]s and other utilities from blocking ]s, thus speeding ] access after major ]s like ]s, ]s, and ]s. They also allow rapid access to all utilities, without having to dig access trenches or resort to confused and often inaccurate utility ]s. | |||
| ==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|xinyi}} and Sonshan MRT] lines in ] | |||
| *Azabu-Hibiya Common Utility Duct in ]{{ref|azabuhibiya}} | |||
| *Minatomirai District lines in ]{{ref|yokohama}} | |||
| *The ], ]' ] 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> | |||
| ==References== | |||
| #{{note|def}} | |||
| #{{note|xinyi}} | |||
| #{{note|azabuhibiya}} | |||
| #{{note|yokohama}} | |||
Latest revision as of 17:47, 8 March 2013
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