Furthermore, towards 1980s, a forest road opened that, with Keyaki-toge Pass in the middle of the Uchisugi forest road at its center, ran to the immediate foot of Sugio-toge Pass in the north and to the south side of Bunanoki-toge Pass in the south.
さらに、1980年代にかけて内杉林道中央部のケヤキ峠を中心に、北は杉尾峠直下に通じ、南はブナノ木峠の南に達する林道が開設された。