During this project, there were many areas where improvements were made to the existing highways but there were some roads (such as the route between Oi-juku (Ena City, Gifu Prefecture) and Mitake-juku (Mitake-cho, Kani-gun, Gifu Prefecture)) that were newly developed.
それまでの街道を改良したものが多かったが、新しく作られた街道筋もあった（大井宿（岐阜県恵那市）-御嶽宿（岐阜県可児郡御嵩町）間など）。