Explore details about location 国道２０号. 国道２０号 is a location situated within the 甲州市 alongside other areas such as 中央自動車道 (CHUO EXPRESSWAY), 日影笹子線, 白井甲州線. Additionally, some smaller parts of 国道２０号 include specific areas like 大菩薩初鹿野線 adding to the diversity of its landscape.