Alukho uhlelo lokudlulisa ingcindezi, njengoba negama lisho, ukuguquka ukusuka emigqeni eminingi yamabhodlela ukuya emigqeni eyodwa yamabhodlela ngaphandle kwengcindezi encane, ukusuka emigqeni eminingi ukuya emigqeni eyodwa yamabhodlela adlulisa umshini owodwa kuphela wokulinda ohlangothini, ibhodlela elidlulisa ngokusebenzisa umehluko oklanywe ngokukhethekile. Uhlaka lokudlulisa ibhodlela nonogada, ngesilawuli sohlelo kanye nesivinini sokuguqula imvamisa okuzenzakalelayo ukuqedela, uma kukhona ibhodlela lokuthulula lingangena ngokuzenzakalelayo ebhakedeni lebhodlela ngaphandle kwebhodlela lokuvimbela ibhodlela, Imboni yemishini yesiphuzo isetshenziswa kakhulu ohlelweni lokudlulisa lokushintsha kweziteshi eziningi okukodwa. isiteshi, isiteshi esisodwa emshinini wokuhlola amabhodlela, umshini wokuhlola amabhodlela emshinini wewayini noma ushintshe ishaneli eyodwa emshinini wokulebula, njll.