Ibhokisi yempahla eyomileyo, ngamanye amaxesha ikwabizwa ngokuba sisikhongozeli sempahla esomileyo, iye yaba yinxalenye ebalulekileyo yezibonelelo zobonelelo-mpahla.Emva kokuthuthwa kwesikhongozeli se-intermodal, iibhokisi zempahla zithatha imisebenzi yokuhanjiswa kweemayile zokugqibela.Iimpahla zemveli zihlala kwizinto zetsimbi, nangona kunjalo, kutsha nje, into entsha-iphaneli edibeneyo-yenza umzobo kwimveliso yeebhokisi zempahla ezomileyo.