meanwhile curvin abdull is back at the terminal.rea vaya keeps its busses here -- they bought 143 of them, brand new. abdull is exactly on schedule, so he has time for a short break. he gives the engine a quick look, but nothing more. >> these are very good engines. we don't suffer a lot of break downs and it is very low on fuel and diesel as well. >> the modern buses are also a boon to the environment. each bus replaces six old, smoke-belching minibus taxis. rehana moosajee was the driving force behind the new bus system. she is head of the department of transport for johannesburg. >> the city had to make a decision to start somewhere. soweto being as populous as it is. is really where we have chosen to start. of course, the project also has to contain with the city that has been apartheid specially planned. unlike most other cities which are pretty compact, johannesburg struggles with issues of urban sprawl. >> traffic jams are not uncommon for a large city that is densely populated. every day, countless commuters struggle to make