To reduce congestion on the Meishin Expressway and respond to the need for a road network that could serve as a radial road and belt line in Kyoto City, the construction of the Kyoto-daini-soto-kanjo-doro Belt Line was subsequently planned to connect the Kyoto-Tanba-doro (formerly the bypass of National Highway 9) to the Keiji Bypass.
後の計画で、名神高速道路の渋滞緩和と京都市の放射線・環状線の機能を持つ道路づくりの必要性から、国道9号バイパスであった京都丹波道路と京滋バイパスを結ぶ路線、京都第二外環状道路が作られることになった。