Ibisobanuro bigufi:

Amababi asohoka mumashini itunganya icyayi kibisi, Hanyuma kugirango akonje nabakunzi ba mashini yumuyaga, kugirango agumane ibara ryiza, impumuro nziza nuburyohe bwicyayi kibisi, kandi umwuka ukonje nawo ukoreshwa mukugabanya ubukonje bwicyayi, bityo kunoza inzira ikurikira.