 It goes through or around Bánovce nad Bebravou, Prievidza, Žiar nad Hronom, Zvolen, Lučenec, Rimavská Sobota and Rožňava.The sections between Žiar nad Hronom and Zvolen are shared with R1 and R3.There is also planned shared section between Ráztočno and Žiar nad Hronom with R3.