to Bramley. Construction of the Crown Interchange on the M1/M2 was postponed when the tenders received were consider too expensive. Work began on improving the roads connecting to the M1 on Oxford Avenue, Corlett Drive and Jan Smuts Avenue in Rosebank. 1972 More motorway on the M1 north was opened extending it from Parktown to Houghton when the 11th Avenue (R25) offramps were completed. The Crown Interchange tender on the M1/M2 was finally awarded and a completion date set for 1974. Heidelberg Interchange on the M2 eastern section was opened and connected the eastern CBD bypass to the M1 in the northern suburbs. 1973 M1 in the northern suburbs was extended from Houghton’s 11th Avenue (R25) offramp to Glenhove Road in Oaklands. Part of the Crown Interchange connecting to the Westgate Interchange was now open. Work on the M1 South from the Crown Interchange was under construction. 1974 M1 in the northern suburbs was now completed to Bramley at Corlett Drive and connected the motorway and Johannesburg to the Provincial and National government's N1 Ben Schoeman Highway and Pretoria. The M1 South was finally connected to Kimberley Road (now the R553 Golden Highway) on 16 August 1974. Final cost The final cost of the twelve-year M1 and M2 project was R85.5 million through the awarding of twenty-seven contracts. The Provincial and National government's contributed R21 million of the final cost while land acquisitions represented 19% of the final cost. The project moved 8.3 million cubic metres of land made up of 0.3 million cubic metres of rock, 8 million cubic metres of slime and earth. Eighty new bridges were constructed, and ten mine dumps moved. Seventy kilometres of drainage pipes were laid and 500,000 cubic metres of concreted poured. Junctions list {| class="plainrowheaders wikitable" |- !scope=col|Municipality !scope=col|Location !scope=col|km !scope=col|mi !scope=col|Junction !scope=col|Destinations !scope=col|Notes |- |rowspan="25"|Johannesburg |rowspan="6"|Johannesburg South |0.0 |0.0 |1 - Columbine Ave | Soweto, Southgate, Mondeor | |- |1.4 |0.0 |2 - Uncle Charlie's Interchange | Southern Bypass |Southbound exit and entry |- |2.0 |0.0 |4 - Golden Highway | Southgate, Eldorado Park, Lenasia |Southbound exit and entry |- |3.8 |0.0 |5 - Xavier Street | Ormonde, Robertsham, Ridgeway | |- |5.4 |0.0 |7 - Booysens Road | Booysens | |- |7.9 |0.0 |9 - Roodepoort | West to Crown, City West, Mayfair, Roodepoort | |- |rowspan="4"|Johannesburg CBD |8.5 |0.0 |10 - City | East |Northbound exit and entry |-