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1996年起,日本建设省决定支援自治体利用下水道管内敷设光纤,建设信息网络。今年4月开始在东京都着手的样板工程,放宽了对下水道管内的光纤不能用于下水道事业以外目的的限制,开始向作为公共设施间的信息开放,使下水道管内敷设的光纤有效地用于自治体、政府机关和公立医院、学校等公共机关、站前广场,使之网络化,目的是向居民提供城市指南和行政,观光信息,防灾和灾情信息。因为利用下水道的已有设施敷设光纤,敷设
Since 1996, the Ministry of Construction in Japan has decided to support local governments in using sewer pipes to install optical fibers and build information networks. The model project that began in Tokyo in April this year relaxed the restrictions on the use of optical fibers in sewer pipes other than the sewerage business, and began to open information as a public facility, so that optical fibers laid in sewer pipes can be effectively used in the local government. , Government agencies, public hospitals, schools and other public institutions, station square, to make it networked, the purpose is to provide residents with city guides and administration, tourism information, disaster prevention and disaster information. Because laying the optical fiber using existing facilities of the sewer, laying