continues south, bypassing Boksburg Central. After Boksburg Central, the R21 crosses the N17 Highway at Elspark and continues south through Sunward Park. After Sunward Park, the R21 heads south-south-east, meeting the R554 (North Boundary Road) and intersects the M43 Road (Barry Marais Road) for the second time at a t-junction in Dawn Park. The R21 and the M43 are co-signed south-west. As Bierman Road, the R21/M43 pass over the M35 Road (Germiston-Heidelberg Road), intersect with the R103, and reach an intersection with the N3 Freeway (Johannesburg-Durban Highway) just east of Vosloorus, which marks the end of the R21. Albertina Sisulu Freeway As the R24 Freeway is known as the Albertina Sisulu Freeway in Ekurhuleni between Eastgate Shopping Centre and Johannesburg International Airport, the use of the name doesn't end there. The R21 is often also called the Albertina Sisulu Freeway, Particularly the section from the O. R. Tambo International Airport interchange north to the N1 Pretoria Eastern Bypass Flying Saucer interchange near Centurion and Pretoria in the City of Tshwane Metropolitan Municipality.It indicates that the R21 from Pretoria to the airport and the R24 from there to Bedfordview are together known as the Albertina Sisulu Freeway. Together, the R21 and the R24 are the only "freeway link" between Pretoria and Johannesburg apart from the Ben Schoeman Freeway. The naming of the R24 Highway from Bedfordview eastwards, together with the R21 freeway from OR Tambo International Airport northwards to Pretoria as the Albertina Sisulu Freeway was already done by the time of the 2010 FIFA World Cup. External links Routes Travel Info Esorfranki Limited 2010 Annual report References 21 Highways in South Africa Provincial routes in South Africa Toll roads in South Africa