Explore details about location 国道２０号. 国道２０号 is a location situated within the 大月市 alongside other areas such as 大幡初狩線, 猿橋, 中央自動車道 (CHUO EXPRESSWAY). Additionally, some smaller parts of 国道２０号 include specific areas like 中央自動車道 (CHUO EXPRESSWAY), 梁川猿橋線, 中央自動車道 adding to the diversity of its landscape.