Ukubala wehle, njengendlela entsha yosizo lwesignali yethrafikhi yasemadolobheni, ivumelanisa nokuboniswa kwezibani zesignali yemoto.Inganikeza isikhathi esisele sezibani ezibomvu, eziphuzi neziluhlaza kubashayeli nabangane.Kunganciphisa ukubambezeleka kwesikhathi kwezimoto ezidlula ezimpambanweni zomgwaqo futhi kuthuthukise ukusebenza kahle kwethrafikhi.Isibonisi senkampani esisanda kwakhiwa sokubala wehla sinosayizi abathathu, 600 *820mm, 760 *960mm kanye ne-pixel tube display countdown (usayizi ungalungiswa ngokuzenzakalelayo).Usayizi ngamunye uhlukaniswe ngezinhlobo ezintathu zokubonisa: isibonisi esibomvu esisodwa, isibonisi esinombala okabili obomvu-oluhlaza kanye nesibonisi esinemibala emithathu ebomvu-ophuzi-oluhlaza.