Motor　vehicle　emissions　are　increasingly　becoming　one　of　the　important　factors　affecting　the　urban　air　quality　in　China.　It　is　necessary　and　useful　to　policy　makers　to　demonstrate　the　situation　given　the　relevant　pollutants　reduction　measures　are　taken.　This　paper　predicted　the　reduction　potentials　of　conventional　pollutants　(PM10,　NOx,　CO,　HC)　under　different　control　strategies　and　policies　in　the　Beijing-Tianjin-Hebei　(BTH)　region　during　2011-2020.　There　are　the　baseline　and　5　control　scenarios　designed,　which　presented　the　different　current　and　future　possible　vehicular　emissions　control　measures.　Future　population　of　different　kinds　of　vehicles　were　predicted　based　on　the　Gompertz　model,　and　vehicle　kilometers　travelled　estimated　as　well.　After　that,　the　emissions　reduction　under　the　different　scenarios　during　2011-2020　could　be　estimated　using　emission　factors　and　activity　level　data.　The　results　showed　that,　the　vehicle　population　in　the　BTH　region　would　continue　to　grow　up,　especially　in　Tianjin　and　Hebei.　Comparing　the　different　scenarios,　emission　standards　updating　scenario　would　achieve　a　substantial　reduction　and　keep　rising　up　for　all　the　pollutants,　and　the　scenario　of　eliminating　high-emission　vehicles　can　reduce　emissions　more　effectively　in　short-term　than　in　long-term,　especially　in　Beijing.　Due　to　the　constraints　of　existing　economical　and　technical　level,　the　reduction　effect　of　promoting　new　energy　vehicles　would　not　be　significant,　especially　given　the　consideration　of　their　lifetime　impact.　The　reduction　effect　of　population　regulation　scenario　in　Beijing　cannot　be　ignorable　and　would　keep　going　up　for　PM10,　CO　and　HC,　excluding　NOx.　Under　the　integrated　scenario　considering　all　the　control　measures　it　would　achieve　the　maximum　reduction　potential　of　emissions,　which　means　to　reduce　emissions　of　PM10,　NOx,　CO,　HC,　by　56%,　59%,　48%,　52%,　respectively,　compared　to　BAU　scenario　for　the　whole　BTH　region　in　2020.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.