Madzikigwa, Bizzar; Mashiri, Mac; Chakwizira, James; Nyoni, Phillip; Makgalemani, Molibi
(SATC, 2008-07)
Paper presented at the 27th Annual Southern African Transport Conference 7 - 11 July 2008 "Partnership for research and progress in transportation", CSIR International Convention Centre, Pretoria, South Africa.