Vorster, J.C.; Exter, J.O.; Cameron, J.W.M.; Southern African Transport Conference (21st : 2002 : Pretoria, South Africa)
(SATC, 2002-07)
Paper presented at the 21st Annual South African Transport Conference 15 - 18 July 2002 "Towards building capacity and accelerating delivery", CSIR International Convention Centre, Pretoria, South Africa.