Umubiri wimodoka rusange ufite inkingi eshatu, inkingi yimbere (inkingi), inkingi yo hagati (B Inkingi), Inkingi yinyuma (C Inkingi) kuva imbere. Kumodoka, usibye inkunga, inkingi nayo ikoresha uruhare rwumuryango.
Inkingi yimbere ni ibumoso hamwe na iburyo imbere yinyuma ihuza igisenge kugeza ku kabari k'imbere. Inkingi y'imbere iri hagati y'icyumba cya moteri n'indogobe, hejuru y'indorerwamo ibumoso n'iburyo, kandi izahagarika igice cyawe cyo guhindura, cyane cyane ku isi, ni ko byaganiriweho.
Inguni aho inkingi yimbere ihagarika ibitekerezo byumushoferi igomba kandi kwitabwaho mugihe usuzumye imbere ya geometrie. Mubihe bisanzwe, umurongo wumushoferi wo kureba unyuze inyuma yinkingi yimbere, ibirungo bya binoclar byuzuye, ntabwo bikubiyemo ubunini bwa geometrike, ariko ibi birimo ubunini bwa geometrike, nibyiza, ariko ibi birimo gukomera kumurongo wa geometioni, ni ikibazo kivuguruzanya. Umushushanya agomba kugerageza kuringaniza byombi kugirango ubone ibisubizo byiza. Mu majyaruguru ya Amerika y'Amajyaruguru yerekana, Volvo ya Suwede yatangije icyiciro cyagenwe cya SCC. Inkingi y'imbere yahinduwe ku buryo buboneye, ivuza ikirahure kibonerana kugira ngo umushoferi aboneyo ku nkingi, ku buryo rero ko impumyi zo mu murima zagabanutse kugera ku mucyo.
