日前，安溪国道358线项目铁观音隧道双向顺利贯通，为安溪县综合立体大交通（大三环）项目的建设发展奠定了坚实基础。
该隧道位于安溪县境内，按左右线分离设计，采用一级公路兼城市主干路标准建设，双向六车道布置，设计车速为60公里/小时。隧道左线全长为2800米，右线全长为2786米，属于特大断面、长隧道。
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