Kiukweli round about aka keep left husaidia sana foleni sababu kama hakuna gari au magari mtu anaweza endelea na safari tofauti na traffic lights ambapo hata kama hakuna gari inabidi kusubiri.Ni kweli. Temporary Round-about wakati wa ujenzi wa Daraja la juu la Kijazi pale Ubungo ilisaidia sana kupunguza adha ya foleni.