The "northern road" went from Suao to Hualien, the precursor of today's Suao-Hualien Highway. The "southern road" went eastward from Laiyi in Pingtung County to Chinlun in Taitung.
「北路」由蘇澳到花蓮，是今天蘇花公路的前身，「南路」由屏東來義鄉往東通達台東金崙。