mpele
(mpele)
38
I am not sure but I think that there is no more R and M roads.
http://www.putevi-srbije.rs/pdf/regulativa/uredba_o_kategorizaciji_puteva.pdf
I have found some discussion on forum http://www.skyscrapercity.com/showthread.php?t=1168459&page=129 , but right now I am not able to study it.