with the existing main Pretoria Road, 5.6 km outside the Johannesburg municipal boundary in the north suburbs. The Westgate section would connect up with an east/west motorway running just south of the Johannesburg CBD. A third section involved the reconfiguration of roads to form an eastern CBD bypass connecting the north–south motorway with Saratoga Avenue. 1958 Improvements began on Harrow Road (Joe Slovo Drive) to widen and deepen the road and included new bridges crossing over it at Joel Road, Alexandra Street and Barnato Street's. Where Harrow Street (Joe Slovo Drive) met Louis Botha Avenue in Berea, this was to become an underpass of the latter. At the southern end of Harrow Road (Joe Slovo Drive), a flyover would cross Saratoga Avenue and would eventually connect in the future with a redesigned Siemert and Sivewright Roads. 1962 The construction on the Sivewright Road / Berea Street and the Siemert Road / End Street reconfiguration, important to connecting the future eastern bypass with the M1 in northern suburbs, at the proposed Killarney interchange, with the M2 East at the proposed Heidelberg Interchange, was nearing completion. Both road reconfiguration's were situated in Doornfontein, east of the Johannesburg CBD. 1963 An investigation began on the planned route of the east/west freeway to examine soil quality of the mine dumps and slime dams as well the position and depth of mine tunnels. Contracts were issued for the section of the M2 freeway from the Westgate Interchange eastward to Mooi Street. Contracts were also issued for the planning of the Heidelberg Interchange and its connection to Harrow Road (Joe Slovo Drive) bypass. 1964 The Harrow Road (Joe Slovo Drive) scheme was completed. Improvements on Harrow Road (Joe Slovo Drive) widened and deepened the road and included new bridges crossing over it at Joel Road, Alexandra Street and Barnato Street's. Where Harrow Street (Joe Slovo Drive) met Louis Botha Avenue in Berea, this had become an underpass of the latter. Work continued on the Berea-Sivewright motorway bypass works. 1965-1966 Work that had started on the eastern-bypass, the Berea-Sivewright Street section, was completed. At the southern end of the M1 Goch Street double-decker section, work began on the Westgate Interchange that would connect the M1 and M2 motorways but work was problematic when mine workings below the site became an issue. 1967 The Heidelberg Interchange was put out to tender and would cost R3.9 million. The rest