Singumenzi weiimfonomfono zemozulu. Iifowuni zikaxakekaziyinxalenye ebalulekileyo yayo nayiphi na inkqubo yonxibelelwano lwezothutho kwaye ziyilelwe ukusingatha iimeko zikaxakeka.Ingaba i-tunnel okanye umzila wesitimela, iimeko eziphuthumayo zinokuthi zenzeke ngokungalindelekanga, kwaye unxibelelwano olukhawulezayo luyimfuneko ekuphenduleni ngokukhawuleza kunye nokuhlangula.Ngokusebenzisaiifowuni ezingangeni manzi, iziphathamandla zezothutho zinokuseka umgca okhuselekileyo nothe ngqo wonxibelelwano nabakhweli, abaqhubi okanye abasebenzi bolondolozo kwimeko kaxakeka.