Isibane sebhuleki ephezulu sidla ngokufakelwa kwinxalenye ephezulu ngasemva kwesithuthi, ukuze imoto eqhuba ngasemva kube lula ukuyibona ibhuleki yangaphambili yesithuthi, ukuthintela ingozi yangasemva. Kuba imoto eqhelekileyo sele inezibane ezimbini zebhuleki ezifakwe ngasemva kwemoto, esinye ngasekhohlo nesinye ngasekunene.
Ngoko ke isibane sebhuleki ephezulu sikwabizwa ngokuba sisibane sebhuleki yesithathu, isibane sebhuleki ephezulu, isibane sebhuleki yesithathu. Isibane sebhuleki ephezulu sisetyenziselwa ukulumkisa imoto engasemva, ukuze kuthintelwe ukungqubana ngasemva.
Izithuthi ezingenazo izibane eziziibhuleki eziphezulu, ingakumbi iimoto ezincinci ezine-chassis ephantsi xa zibhuleki ngenxa yendawo ephantsi yesibane sebhuleki yangasemva, zihlala zingakhanyi ngokwaneleyo, ezi zithuthi zilandelayo, ingakumbi abaqhubi beelori, iibhasi kunye neebhasi ezine-chassis ephezulu ngamanye amaxesha kunzima ukuzibona ngokucacileyo. Ke ngoko, ingozi efihlakeleyo yokungqubana ngasemva inkulu kakhulu. [1]
Iziphumo ezininzi zophando zibonisa ukuba ukukhanya kwebhuleki ephezulu kunokuthintela kwaye kunciphise ukwenzeka kokungqubana kwangasemva. Ke ngoko, izibane zebhuleki ephezulu zisetyenziswa kakhulu kumazwe amaninzi aphuhlileyo. Umzekelo, eMelika, ngokwemigaqo, zonke iimoto ezisandula ukuthengiswa kufuneka zixhotyiswe ngezibane zebhuleki ephezulu ukusukela ngo-1986. Zonke iilori ezikhaphukhaphu ezithengisiweyo ukusukela ngo-1994 kufuneka zibe nezibane zebhuleki ephezulu.
