Ibhampa inemisebenzi yokuvikela ukuphepha, ukuhlobisa imoto kanye nokwenza ngcono izici ze-aerodynamic zemoto. Mayelana nokuphepha, imoto ingadlala indima yesivimbeli uma kwenzeka ingozi yokushayisana kwesivinini esiphansi futhi ivikele umzimba wangaphambili nowangemuva; Ingavikela abahamba ngezinyawo uma kwenzeka kuba nezingozi nabahamba ngezinyawo. Mayelana nokubukeka, kuhlobisa futhi sekuyingxenye ebalulekile yokuhlobisa ukubukeka kwezimoto; Ngesikhathi esifanayo, i-bumper yemoto nayo inomphumela othile we-aerodynamic.
Ngesikhathi esifanayo, ukuze kuncishiswe ukulimala kubagibeli uma kwenzeka kuba nengozi engaseceleni, ubhampa wesicabha ngokuvamile ufakwa emotweni ukuze kuthuthukiswe amandla omphumela wokunqanda ukushayisana komnyango. Le ndlela iyasebenza futhi ilula, inoshintsho oluncane ekwakhekeni komzimba, futhi iye yasetshenziswa kabanzi. Kusukela ngo-1993 eShenzhen International Automobile Exhibition, iHonda Accord yavula ingxenye yomnyango ukuze iveze ubhampa wesicabha kubabukeli ukukhombisa ukusebenza kahle kwayo kwezokuphepha.
Ukufakwa kobhampa wesicabha ukubeka imishayo eminingi yensimbi enamandla aphezulu ngokuvundlile noma ngokugobile kuphaneli yomnyango womnyango ngamunye, edlala indima yobhampa wangaphambili nangemuva, ukuze yonke imoto "iphelezelwe" ngamabhampa ngaphambili, ngemuva, kwesokunxele nakwesokudla, ukwakha "udonga lwethusi nodonga lwensimbi", ukuze abagibeli bemoto babe nendawo yokuphepha ephezulu. Yiqiniso, ukufaka lolu hlobo lwe-bumper emnyango ngokungangabazeki kuzokwandisa izindleko ezithile kubakhiqizi bezimoto, kodwa kubagibeli bezimoto, ukuphepha nomuzwa wokuphepha kuzokhula kakhulu.
