In the 1970s, when modern office buildings and broad boulevards changed the face of Taipei, city planners decided to extend Tun Hua South Road further south to make it a major carrier of north-south traffic.
為了因應都市建設和交通流量的需求，台北市政府遂根據民國五十九年公佈的方案，計畫延長敦化南路，以連接信義路、和平東路，使敦化南北路成為台北市南北向五十米寬的主要林園大道。