Johannesburg
Roads

Johannesburg shares a network of metropolitan routes with Krugersdorp and Ekurhuleni. The fact that Johannesburg is not near a large navigable body of water has meant that ground transportation has been the most important method of transporting people and goods in and out of the city. One of Africa's most famous "beltways" or ring roads/orbitals is the Johannesburg Ring Road. The road is composed of three freeways that converge on the city, forming an 80-kilometre (50 mi) loop around it: the N3 Eastern Bypass, the N1 Western Bypass and the N12 Southern Bypass. The N3 was built exclusively with asphalt, while the N12 and N1 sections were made with concrete, hence the nickname given to the N1 Western Bypass, "The Concrete Highway". In spite of being up to 12 lanes wide in some areas, the Johannesburg Ring Road is frequently clogged with traffic. The Gillooly's Interchange (renamed George Bizos Interchange in 2021), built on an old farm and the point at which the N3 Eastern Bypass and the R24 Airport Freeway intersect, is the busiest interchange in the Southern Hemisphere. It is claimed that the N1 is the busiest road in South Africa.

Johannesburg has a lot of freeways connected to it. The N1 connects northwards to Pretoria and Polokwane and southwards to Bloemfontein and Cape Town. The N3 connects south-east to Durban. The N12 connects westwards to Potchefstroom and Kimberley and eastwards to eMalahleni. The N14 passes at the north-western corner of the Johannesburg Municipality, connecting Pretoria with Krugersdorp. The N17 connects eastwards to Ermelo and Eswatini. The R21 connects the East Rand and O. R. Tambo International Airport with Pretoria. The R24 connects the Johannesburg CBD with the airport. The R59 connects southwards to Vereeniging and Sasolburg. The M1 connects the Johannesburg CBD with the northern suburbs and the southern suburbs. The M2 connects the Johannesburg CBD with the Germiston CBD to the east. The M1 and M2 freeways are congested due to mass urbanisation.

Johannesburg also has a lot of non-freeway routes that connect to other towns and cities. The R24 connects the Johannesburg city centre with Roodepoort, Krugersdorp and Rustenburg to the west. The R25 connects Johannesburg's northern suburbs with Modderfontein and Kempton Park to the north-east. The R29 connects the city centre with Germiston, Boksburg and Benoni to the east. The R41 connects the city centre with Roodepoort and Randfontein to the west. The R55 connects Sandton with Pretoria West to the north. The R82 connects Johannesburg South with Vereeniging to the south. The R101 connects Sandton with Midrand, Centurion and Pretoria to the north. The R511 connects Sandton with Diepsloot and Hartbeespoort to the north. The R512 connects Randburg with Lanseria International Airport and Hartbeespoort to the north.
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