The R21 is a major north–south provincial route in eastern Gauteng Province, South Africa. Built in the early 1970s, it remains one of two freeways linking Pretoria with Johannesburg, via the R24. As the eastern of the two freeways, it links the Pretoria city centre with OR Tambo International Airport, the N12 freeway, and Boksburg. Between the Solomon Mahlangu Drive on-ramp in Monument Park, Pretoria, and the N12 in Boksburg, the R21 is an 8 lane highway and motorway (freeway), with 4 lanes in each direction. It has off-ramps leading to Irene, Olifantsfontein, Benoni, and Kempton Park, including a partial offramp to Atlas Road. The route intersects the N1 Highway near Centurion, the R24 near the airport, the N12 and N17 in Boksburg, and the N3 near Vosloorus on the East Rand, where it ends. The section from the N12 to the N3 is not a freeway. As early as the 1970s there were proposals to extend the R21 freeway further south and the freeway may be linked with the current eastern terminus of the M2 in Germiston in future. It is also designated as the P157.
The R25 is a provincial route in South Africa that connects Johannesburg with Groblersdal via Kempton Park, Bapsfontein and Bronkhorstspruit.
The R101 is a Regional Route in South Africa that is the designation for some of the old sections of roads that were previously the N1, prior to upgrading. It only has 2 sections, from Bellville to Worcester and from Johannesburg to Polokwane.
The M57 is a major metropolitan route in Greater Johannesburg, South Africa. A north/south route, it connects Germiston with the south-eastern suburbs of Pretoria via Kempton Park and Olifantsfontein. For most of its length, it is an alternative route to the R21 freeway.
The M18 road is a long metropolitan route in Gauteng, South Africa. It connects Pretoria with Thembisa via Centurion and Olifantsfontein.
The M10 road is a long metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Sunderland Ridge with Mamelodi via Lyttelton and Garsfontein.
The M6 road is a long metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Pretoria West with a rural area east of Pretoria via Pretoria CBD, Brooklyn, Lynnwood and Wapadrand.
The M5 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Fountains Valley in southern Pretoria with Annlin in northern Pretoria via Sunnyside, Arcadia and Gezina. For much of its route, it is named Steve Biko Road.
The M7 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Proclamation Hill with Queenswood via Pretoria Industrial, Groenkloof, Brooklyn and Hatfield.
The M8 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Capital Park with Mamelodi via Gezina, Villieria and Eersterust.
The M1 road is a short metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Pretoria West and the Pretoria CBD with Pretoria North via Mayville.
The M31 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects the southern suburbs of Centurion, from the Rietvlei Nature Reserve to Rooihuiskraal via Irene and Highveld.
The M17 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects the suburb of Kirkney in Pretoria with the northern parts of Soshanguve and Mabopane.
The M21 road is a long metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Ga-Rankuwa with Hammanskraal via Mabopane and Soshanguve.
The M27 road is a short metropolitan route in the City of Tshwane in Gauteng, South Africa. It is in the city of Centurion, connecting Rooihuiskraal with Pierre van Ryneveld Park via the Centurion CBD and Lyttelton.
The M29 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It is made up of two disjoint segments in the northern suburbs of Pretoria, with one section connecting Rietondale to Waverley and the other section connecting Montana Park to Doornpoort.
The M39 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects a rural area north of Pretoria (Pyramid) with a rural area north-west of Pretoria (Lebalangwe) via Soshanguve and Mabopane.
The M20 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It connects Akasia with Hebron via Soshanguve.
The M34 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It is in the city of Centurion, connecting Eldoraigne with Irene via Clubview, Die Hoewes and Doringkloof.
The M36 road is a metropolitan route in the City of Tshwane in Gauteng, South Africa. It is in the city of Centurion, connecting Irene with Kosmosdal via Highveld.
M31 in Irene 
M27 near Pierre van Ryneveld Park 
M10 near Monument Park 
