U-N4 ngumzila kazwelonke eNingizimu Afrika osuka eSkilpadshek emngceleni weBotswana, udlule eRustenburg, ePitoli, eMalahleni naseMbombela, uye eKomatipoort emngceleni weMozambique. "RDDA SOUTH AFRICAN NUMBERED ROUTE DESCRIPTION AND DESTINATION ANALYSIS". NATIONAL DEPARTMENT OF TRANSPORT. May 2012. Kulandwe ngomhlaka 25 March 2021.