Urugi rw'imodoka ni uguha umushoferi n'abagenzi bafite uburyo bwo kugera ku kinyabiziga, kandi utandukanya kwivanga hanze y'imodoka, kugirango ugabanye ingaruka ku rugero runaka, kandi urinde abayirimo. Ubwiza bw'imodoka nayo bufitanye isano n'imiterere y'umuryango. Ubwiza bwumuryango bugaragarira cyane mubikorwa byo kurwanya kugongana byumuryango, imikorere yumuriro, byoroshye gufungura no gufunga umuryango, kandi birumvikana, nibindi bipimo byerekana imikoreshereze yimikorere. Kurwanya kugongana ni ngombwa cyane, kuko iyo ikinyabiziga gifite ingaruka kuruhande, intera ya buffer ni ngufi cyane, kandi biroroshye gukomeretsa abatwara ibinyabiziga.
