Mu turere duhora dukora ubwikorezi no kububiko, guhuza ikoranabuhanga ryateye imbere byabaye ngombwa. Imwe mu nshya nkiyi ni trolley yo kurwanya amagambo, umutungo wingenzi wagenewe kuzamura umutekano n'imikorere mubikorwa bitandukanye. Izi trolleys zihariye ntabwo byorohereza kugenda ibicuruzwa gusa ahubwo nanone bigabanya cyane ingaruka zishyira mubikorwa