Ka whiwhi te taha mua i te kaha pānga, ka tohatohahia e te parepare o mua ki ngā pouaka mimiti pūngao i ngā taha e rua, kātahi ka tukuna ki te reera o mua i te taha maui me te taha matau, kātahi ki te toenga o te hanganga o te tinana.
Ka pāngia te tuara e te kaha pānga, ā, ka tukuna te kaha pānga e te parepare o muri ki te pouaka mimiti pūngao i ngā taha e rua, ki te reera o muri maui me matau, kātahi ki ētahi atu hanganga tinana.
Ka taea e ngā parepare pānga iti te tu atu i te pānga, ko ngā parepare pānga teitei ia te tuku kaha, te horapa me te ārai, ā, i te mutunga ka whakawhiti ki ētahi atu hanganga o te tinana, kātahi ka whakawhirinaki ki te kaha o te hanganga o te tinana hei ātete.
Kāore a Amerika e whakaaro ana ki te parepare hei whirihoranga haumaru: Kāore a IIHS i Amerika e whakaaro ana ki te parepare hei whirihoranga haumaru, engari hei taputapu hei whakaiti i te ngaronga o te tukinga tere iti. Nō reira, ko te whakamātautau i te parepare e ahu mai ana hoki i te ariā me pēhea te whakaiti i te ngaronga me te utu tiaki. E whā ngā momo whakamātautau tukinga parepare IIHS, arā, ko ngā whakamātautau tukinga o mua me muri (tere 10km/h) me ngā whakamātautau tukinga o mua me muri (tere 5km/h).
