The "hadari gwaje-gwaje" - tasiri gwaje-gwaje, a cikin mai kyau Portuguese - bauta wa auna matakan m tsaro na motoci, wato, da ikon da mota don rage girman sakamakon wani hatsari, ko ta wurin zama bel ko kariya sanduna gefen, airbags. , Shirye-shiryen ɓangarorin naƙasar jiki, tagogi masu karewa ko ƙananan bumpers, da sauransu.
An gudanar da Euro NCAP a cikin "tsohuwar nahiyar", ta IIHS a Amurka da Latin NCAP a Latin Amurka da Caribbean, waɗannan gwaje-gwajen sun ƙunshi kwaikwaiyo na hatsarori a cikin yanayi na ainihi, ana yin shi a matsakaicin saurin 64 km/h.
Ko da yake an yi rikodin hatsarori sama da wannan saurin, bincike ya tabbatar da cewa mafi yawan hadurran da ke mutuwa suna faruwa a cikin kilomita 64 a cikin sa'a. Yawancin lokaci, lokacin da abin hawa ke tafiya, alal misali, a 100 km / h, ya ci karo da wani cikas a gabansa, da wuya a lokacin tasirin gudu yana da 100 km / h. Kafin karon, ilhamar direban ita ce ƙoƙarin dakatar da abin hawa da sauri, wanda ke rage saurin zuwa ƙimar kusa da 64 km / h.
Hakanan, yawancin gwaje-gwajen haɗari suna bin ƙa'idodin "Offset 40". Menene tsarin "Offset 40"? Halin karo ne wanda kashi 40% na gaba ne kawai ke karo da wani abu. Wannan shi ne saboda a mafi yawan hatsarori, aƙalla ɗaya daga cikin direbobi yana ƙoƙarin kauce wa yanayinsa, wanda ke nufin cewa tasirin gaba 100% ba ya faruwa.