Ingaphambili lithola amandla okushaya, asatshalaliswa yi-bumper yangaphambili emabhokisini okumunca amandla ezinhlangothini zombili bese edluliselwa ku-rail yangaphambili kwesobunxele nakwesokudla, bese kuba kulo lonke isakhiwo somzimba.
Ingemuva ithintwa amandla okushaya, futhi amandla okushaya adluliselwa yibhampa yangemuva ebhokisini lokumunca amandla ezinhlangothini zombili, ku-rail yangemuva kwesobunxele nakwesokudla, bese kuba kwezinye izakhiwo zomzimba.
Amabhampa okushaya ngamandla aphansi angabhekana nokushaya, kuyilapho amabhampa okushaya ngamandla aphezulu edlala indima yokudlulisa amandla, ukuhlakazeka kanye nokubopha, futhi ekugcineni adluliselwe kwezinye izakhiwo zomzimba, bese ethembela emandleni esakhiwo somzimba ukuze amelane naso.
IMelika ayibheki i-bumper njengokulungiswa kokuphepha: I-IIHS eMelika ayibheki i-bumper njengokulungiswa kokuphepha, kodwa njengokwesekwa kokunciphisa ukulahlekelwa ukushayisana ngesivinini esiphansi. Ngakho-ke, ukuhlolwa kwe-bumper kusekelwe emcabangweni wokuthi unganciphisa kanjani izindleko zokulahlekelwa nokugcinwa. Kunezinhlobo ezine zokuhlolwa kokushayisana kwe-bumper ye-IIHS, okuyizivivinyo zokushayisana zangaphambili nangemuva (isivinini esingu-10km/h) kanye nokuhlolwa kokushayisana ngaphambili nangemuva (isivinini esingu-5km/h).
