Itara ryinshi rya feri ryashyizwe mubisanzwe hejuru yinyuma yikinyabiziga, kugirango ibinyabiziga bigenda inyuma byoroshye kumenya imbere ya feri yikinyabiziga, kugirango birinde impanuka yinyuma.Kuberako imodoka rusange ifite amatara abiri ya feri yashyizwe kumpera yimodoka, imwe ibumoso n iburyo, bityo itara ryinshi rya feri naryo ryitwa itara rya feri ya gatatu, itara rya feri ndende, itara rya gatatu rya feri.Itara ryinshi rya feri rikoreshwa mukuburira ikinyabiziga inyuma, kugirango wirinde kugonga inyuma
Ibinyabiziga bidafite amatara maremare ya feri, cyane cyane imodoka n’imodoka nto zifite chassis nkeya iyo feri kubera umwanya muto wurumuri rwa feri yinyuma, mubisanzwe ntabwo urumuri ruhagije, ibinyabiziga bikurikira, cyane cyane abashoferi b'amakamyo, bisi na bisi zifite chassis ndende rimwe na rimwe biragoye kubona neza.Kubwibyo, akaga kihishe kugongana ninyuma ni nini.[1]
Umubare munini wubushakashatsi bwerekana ko urumuri rwa feri rwinshi rushobora gukumira no kugabanya ibibaho byo kugongana kwinyuma.Kubwibyo, amatara maremare ya feri akoreshwa cyane mubihugu byinshi byateye imbere.Kurugero, muri Reta zunzubumwe zamerika, ukurikije amabwiriza, imodoka zose zagurishijwe zigomba kuba zifite amatara maremare kuva 1986. Amakamyo yose yoroheje yagurishijwe kuva 1994 agomba no kuba afite amatara maremare.
