Although the operation of local trains was divided into two lines, the same blocking system was assigned to both inner and outer tracks, and the traffic lights, installed at a distance designed with the assumption of braking power of freight trains, gave immediate signals to restrict the speed of the following trains.
しかし緩行運転を2系統に分割したとはいえ、内側線は外側線と同じ閉塞割りであり貨物列車のブレーキ力を想定した信号配置であった事から、すぐに後続の列車に制限信号を与える結果となった。