Explore details about location 国道1号線(National Route 1). 国道1号線(National Route 1) is a location situated within the 島田市 alongside other areas such as 県道家山停車場線, 掛川川根線, 島田金谷線. Additionally, some smaller parts of 国道1号線(National Route 1) include specific areas like 島田大井川線, 島田吉田線 adding to the diversity of its landscape.