Abstract
The highway joint development scheme, which is aimed at constructing highways and buildings in an integrated way, was established in 1989. This report briefly outlines the background behind the establishment of the scheme, road network improvement plans in three major city areas, issues related with arterial roads improvement, the scope and contents of the scheme, its applications, and problems with its implementation. Japanese Ministry of Construction and OECD/Road Transport Research Programme held the seminar on "future road transport systems and infrastructures in urban areas" in Chiba, Japan on 4th - 6th June 1991 sponsored by the Japanese organizing committee.