Bumpers ifite imirimo yo kurinda umutekano, gushushanya ikinyabiziga, no kuzamura ibimenyetso bya Aerodynamic biranga ikinyabiziga. Duhereye ku mutekano wabonaga, iyo impanuka yogonganya yihuta ibaho, imodoka irashobora kugira uruhare runini mu kurinda imibiri y'imodoka imbere n'inyuma; Irashobora kugira uruhare runaka mukingira abanyamaguru mugihe habaye impanuka hamwe nabanyamaguru. Kubijyanye no kugaragara, ni ibcorave kandi byabaye igice cyingenzi cyo gushushanya isura yimodoka; Muri icyo gihe, bumper yimodoka nayo ifite ingaruka zimwe na kimwe cya aerodynamic.
Muri icyo gihe, kugirango bagabanye ibikomere kubatuye mumodoka mugihe habaye impanuka yo kugongana kuruhande, ubusanzwe umubyimba wimodoka ushyizwe kumodoka kugirango wongere imbaraga zo kurwanya induru yimodoka. Ubu buryo burafatika, bworoshye, kandi bufite impinduka nke kumiterere yumubiri, kandi ikoreshwa cyane. Kwishyiriraho urugi bumper ni ugushiraho imitwe myinshi yicyuma. , gukora urukuta "rw'umuringa", kugira ngo imodoka iyinjire ifite ahantu ntarengwa. Birumvikana ko gushiraho urugi rwurugi nta gushidikanya ko bizamura ibiciro bimwe byabakora imodoka, ariko kubatwara imodoka, umutekano no kumva umutekano bizongera byinshi.