Explore details about location 国道２１８号. 国道２１８号 is a location situated within the 延岡市 alongside other areas such as 国道１０号, 八重原延岡線, 浦城東海線. Additionally, some smaller parts of 国道２１８号 include specific areas like 北方土々呂線, 樫原細見線 adding to the diversity of its landscape.