National routes inSouth Africa are a class oftrunk roads andfreeways which connect major cities. They form the highest category in theSouth African route numbering scheme, and are designated withroute numbers beginning with "N", from N1 to N18. Most segments of the national route network are officially proclaimed National Roads that are maintained by theSouth African National Roads Agency (SANRAL), but some segments are maintained by provincial or local road authorities.[1]
The system was mostly built during the 1970s by theNational Party government of South Africa, although construction of new roads and repairs of existing stretches continue today. The system was modeled on the United StatesInterstate Highway network.
Although the termsNational Road andNational Route are sometimes regarded as synonymous, they have distinct meanings, and not all national routes are National Roads, while some "R"-numbered routes are proclaimed National Roads.[1]
National routes are defined and numbered by the Route Numbering and Road Traffic Signs Sub Committee within the Roads Co-ordinating Body,[2] an organisation which contains representatives from road authorities in national, provincial and local government. The term "national road" is frequently used to refer to a national route, but technically a "national road" is any road maintained by theSouth African National Roads Agency (SANRAL) and need not necessarily form part of a national route, and there are "R" routes that are proclaimed National Roads.[1] There are also road segments of the national route network that are maintained by provincial or local authorities rather than SANRAL, and are thus not National Roads.[3]
National Routes are denoted with the letterN followed by a number indicating the specific route. On maps and some signage, national routes are shown by apentagon with the number of the road inside. There are fifteen declared national routes, which are listed below.[4]
An earlier scheme, deviating considerably from the current numbering, is described in the 1970 Shell Road Atlas of South Africa and other contemporaneous sources:
N1 - equivalent to the current N9 fromGeorge toColesberg, and then the current N1 from there toBeitbridge (with deviations as some newer parts had yet to be built)
N2 - equivalent to the section of the current N2 fromCape Town toDurban
N3 - equivalent to the current N3 fromDurban toLadysmith, then following the current N11 to Volksrust, and the current R23 from there to Heidelberg, and then continuing equivalent to the N3 until its end in Johannesburg
N5 - equivalent to the current N5 but fromWinburg past Harrismith to Ladysmith (the latter part now signed as the N3)
N6 - equivalent to the current N6, except that it begins from King William's Town, the section from there to Stutterheim now being the R346, and ending inReddersburg.
N7 - equivalent to the section of the current N10 from Ncanaha to just pastMiddelburg