Running south from the Rajomon Gate, the road crosses the Kamo-gawa River (the Yodo-gawa water system) in Shimotoba (near the present Kyoto Minami Interchange) and runs along the bank of Kamogawa River (merged with the Katsuragawa River along the way) to the Noso Crossing in Yodo (the Fushimi Ward, Kyoto City).
羅城門を南に下ったあと、下鳥羽（現在の京都南インターチェンジ付近）で鴨川(淀川水系)を渡り、鴨川（途中で桂川に合流）の堤防沿いに淀（京都市伏見区）の納所交差点まで結ぶ。