However, the section between Misasagi and Sanjo-keihan, out of the entire section of the project, became controversial because the Keihan Keishin Line had been operated on the ground in this section.
しかし、その時計画されたルートのうち、御陵～三条京阪間は京阪京津線が地上を走っており、この競合が問題となった。