Imodoka rusange ifite inkingi eshatu, inkingi y'imbere (inkingi A), inkingi yo hagati (inkingi B), inkingi y'inyuma (inkingi C) kuva imbere ujya inyuma. Ku modoka, uretse inkunga, inkingi inagira uruhare nk'urugi rw'umuryango.
Inkingi y'imbere ni inkingi y'ibumoso n'iburyo ihuza igisenge n'akazu k'imbere. Inkingi y'imbere iri hagati y'igice cya moteri n'ikibuga cy'indege, hejuru y'indorerwamo z'ibumoso n'iburyo, kandi izafunga igice cy'izuba ryawe ryo kuzenguruka, cyane cyane ku mpande z'ibumoso, bityo biganirwaho byinshi.
Inguni aho inkingi y'imbere ifunga aho umushoferi abona igomba no kwitabwaho iyo urebye imiterere y'inkingi y'imbere. Mu bihe bisanzwe, umurongo w'aho umushoferi abona unyuze mu nkingi y'imbere, uburebure bw'inyuma bw'inguni ni dogere 5-6, ukurikije uburyo umushoferi amerewe neza, uko Inguni ifatanye ni ko iba nziza, ariko ibi birimo gukomera kw'inkingi y'imbere, atari ukugira ngo ibe ifite ingano runaka y'ubunini kugira ngo ikomeze gukomera kw'inkingi y'imbere, ahubwo no kugabanya ingaruka z'umurongo w'aho umushoferi abona, ni ikibazo kivuguruzanya. Umushushanyi agomba kugerageza kuringaniza ibyo byombi kugira ngo abone umusaruro mwiza. Mu imurikagurisha Mpuzamahanga ry'imodoka ryabereye muri Amerika y'Amajyaruguru mu 2001, Volvo yo muri Suwede yashyize ahagaragara imodoka yayo nshya ya SCC. Inkingi y'imbere yahinduwe ihinduka ishusho ibonerana, iriho ikirahure gibonerana kugira ngo umushoferi abone isi yo hanze binyuze mu nkingi, ku buryo ahantu hatagaragara h'aho umuntu abona hagabanuka cyane.
