In　traffic　fields　of　the　ring　road　traffic　influents,　the　main　researches　are　often　concentrated　in　researching　the　local　traffic　influence　form　traffic　aspect,　or　researching　how　to　improve　and　optimize　the　ring　roads,　and　the　other　impacts　from　economics　and　environments　aspects　and　so　on.　In　this　paper,　we　studied　the　traffic　impacts　from　the　whole　aspect　through　building　a　simplified　the　ring　road　system　model　so　that　we　can　clear　the　effects　of　it　more　visually,　what＇s　more,　the　negative　effects.　It　makes　people　see　the　negative　effects　of　the　ring　road　which　they　were　often　ignored.　©　2009　IEEE.