Babban hasken birki yana sanyawa a saman saman bayan abin hawa, ta yadda motar da ke bayan motar ta kasance cikin sauki don gano gaban birkin motar, don hana afkuwar hatsarin baya.Domin matsakaita mota ta riga an sanya fitilun birki guda biyu a ƙarshen motar, ɗaya hagu da ɗaya dama.

Don haka babban hasken birki kuma ana kiransa hasken birki na uku, babban hasken birki, hasken birki na uku.Ana amfani da babban hasken birki don faɗakar da abin hawa a baya, don gujewa karon ƙarshen baya.

Motocin da ba su da fitilun birki, musamman ma motoci da ƙananan motoci masu ƙarancin chassis lokacin yin birki saboda ƙarancin matsayi na hasken birkin baya, yawanci ba su isa haske ba, motocin masu zuwa, musamman direbobin manyan motoci, bas da bas masu babban chassis wani lokacin wahala. don gani a fili.Saboda haka, ɓoyayyun haɗarin karo na baya-bayan nan yana da girma.[1]

Sakamakon bincike mai yawa ya nuna cewa babban hasken birki na iya hanawa da kuma rage faruwar karo na baya-baya yadda ya kamata.Don haka, ana amfani da fitilun birki sosai a ƙasashe da dama da suka ci gaba.Alal misali, a Amurka, bisa ga ka'ida, duk motocin da aka sayar da su dole ne a sanye su da manyan fitilun birki tun 1986. Duk motocin da aka sayar tun 1994 dole ne su kasance da manyan fitilun birki.