Explore details about location 国道20号. 国道20号 is a location situated within the 塩尻市 alongside other areas such as 本山床尾線, 長野自動車道, 塩尻鍋割穂高線. Additionally, some smaller parts of 国道20号 include specific areas like 国道19号, 松本塩尻線, 御馬越塩尻停車場線 adding to the diversity of its landscape.