Explore details about location 国道３０３号. 国道３０３号 is a location situated within the 高島市 alongside other areas such as 北船木北畑線, 国道３６７号, 国道３６７号. Additionally, some smaller parts of 国道３０３号 include specific areas like 国道303号線 (Route 303) adding to the diversity of its landscape.