the use of the name doesn't end there. The R21 e-toll freeway is often also called the Albertina Sisulu Freeway, particularly the section from its OR Tambo International Airport interchange with the R24 north to the Flying Saucer Interchange with the N1 southeast of Pretoria in City of Tshwane Metropolitan Municipality. Together, the R24 & R21 make up the only other "highway system" after the Ben Schoeman Highway that connects Pretoria and Johannesburg. The R21 e-toll freeway, together with the freeway section of the R24, was already named the Albertina Sisulu Freeway by the time of the 2010 FIFA World Cup while the remainder of the R24 to Krugersdorp was renamed in 2013. References External links Routes Travel Info 24 24 Streets and roads of Johannesburg Highways in South Africa Provincial routes in South Africa