Ugufata mu mutwe hagati y’ipine n’isi birungikwa ku mushoferi biciye ku nzira y’amaguru n’umubiri. Muri rusangi tuvyita "inyiyumvo y'inzira", kandi umushoferi ni we atwara neza cane ashingiye ku nyishu y'inzira, kuko Gucungera imodoka iriko iragenda uretse guhindura uruziga rwo gutwara, hariho n'uguhinduka kw'imbere kw'uburemere bw'imodoka, ariko kugira ngo umuntu ashobore gutahura neza hagati y'uburemere bw'imodoka, uretse n'ukuntu umushoferi ubwiwe yiyumva, iyo ntebe na yo iratanga imfashanyo ikomeye.
Intebe y’amasiganwa yakozwe mu buryo budasanzwe kugira ngo umubiri w’umuntu ugereranye n’umubiri w’umuntu ku muvuduko munini. Ku bw’ivyo, ivyo bice bibiri vy’inyuma y’intebe n’igihimba c’intebe birakomezwa cane cane, ku buryo igisusu, urutugu n’umugongo w’umubiri w’umuntu bishobora kugira ubuyobozi bwiza bwo mu ruhande. Mu gushigikira, ubukomezi bw’intebe ubwabwo burakeneye gukomezwa, kugira ngo bushobore guhangana n’agaciro k’uguhindukira kw’inyuma G k’uguhindukira, kandi bishobora kwumva neza ukuntu ipine n’ibarabara ry’ibarabara rifata neza. Intebe y’amarushanwa rusangi ifise intebe z’urushato n’intebe z’impuzu. Irangwa n’ubuhinga bwa ergonomics n’ugupfuka neza. Naho woba uriko uragenda neza gute, iyo nzira y’ibice bibiri ku mpande zompi z’intebe izogushikana. Mubifatanye.
