transport logistics

Just at a rough calculation if we have 40 trucks a day carrying 30 tonne every day for a year that comes to 3066000 tonnes Now that's a lot trucks to load each day that then need to be able to travel 900km without breaking down nor sure of the quality of trucks in Africa. I am keen on BGS and have but a reasonable holding but this is the only thing that concerns me would really like to hear what other holders think about the transport to port. As mentioned before there is a possibility of empty trucks travelling back to port but they won't be bulk ore carriers more like container trucks Interested in your thoughts Keen As