Ukukhanya okuphezulu okuthe xaxa kufakwe engxenyeni engenhla yesemuva yemoto, ukuze imoto yokushayela ngemuva kulula ukuthola ingaphambili lengozi yemoto, ukuvikela ingozi ende. Ngoba imoto ejwayelekile inamalambu amabili e-brake afakwe ekugcineni kwemoto, enye ishiywe futhi ilungelo elilodwa, ngakho-ke ukukhanya okuphakeme okuphezulu kubizwa ngokuthi ukukhanya kwe-brake yesithathu, ukukhanya okuphakeme kokukhanya, ukukhanya kwe-brake yesithathu. Ukukhanya okuphezulu kwe-brake kusetshenziselwa ukuxwayisa imoto ngemuva, ukuze kugwenywe ukushayisana kwangemuva kokugcina
Izimoto ezingenazibani eziphakeme zokubhuka, ikakhulukazi izimoto nezimoto ezincane ezinama-chassis aphansi lapho kukhanya ngenxa yokukhanya okuphansi kokukhanya kwangemuva, okuvame ukungabi namabhasi amaloli, ikakhulukazi amabhasi anama-chassis aphezulu kwesinye isikhathi kuba nzima ukubona kahle. Ngakho-ke, ingozi efihlekile yokushayisana kwangemuva kukhulu. [1]
Inani elikhulu lemiphumela yocwaningo libonisa ukuthi ukukhanya okuphezulu kwe-brake kungavimbela ngempumelelo futhi kunciphise ukwenzeka kokushayisana kwangemuva. Ngakho-ke, amalambu aphukile aphezulu asetshenziswa kabanzi emazweni amaningi athuthukile. Isibonelo, e-United States, ngokusho kwemithethonqubo, zonke izimoto ezisanda kuthengiswa kufanele zifakwe amalambu aphezulu aphezulu kusukela ngo-1986. Wonke amaloli akhanyayo athengiswa kusukela ngonyaka we-1994 nawo kumele abe namalambu okubhaxaka aphezulu.
