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Revision as of 23:11, 18 April 2006
A common utility duct is a structure, above or under ground, which contains more than two types of public utility, and includes its own drainage, ventilation, lighting, communication, power, monitoring systems, and so on.
Advantages of common utility ducts
The advantages of such facilities are the reduction of maintenance manholes, accurate positioning of manholes, one-time relocation, and less excavation and repair. This helps keep roads smoother. One of the greatest advantages is public safety. Common utility ducts prevent downed power lines and other utilities from blocking roads, thus speeding emergency access after major natural disasters like earthquakes, hurricanes, and tsunamis. 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 Japan, where government officials have sought ways to reduce the catastrophic effects of earthquakes in their tectonically active country. Their use, however, is not limited to that country and there are many examples of such common utility ducts. These include:
- Incporated with Xinyi and Sonshan MRT Rapid transit lines in Taipei, Taiwan
- Azabu-Hibiya Common Utility Duct in Tokyo, Japan
- Minatomirai District lines in Yokohama, Japan