Multi-year　(1999-2014)　vehicular　unregulated　pollutants　emissions　in　China,　including　SO2,　CH4,　N2O,　NH3,　Indeno(1,2,3-cd)pyrene　(IPY),　Benzo(k)fluoranthene　(BkF),　Benzo(b)fluoranthene　(BbF),　Benzo(a)pyrene　(BaP),　di-oxins　and　furans,　were　estimated　based　on　emission　factors　calculated　by　COPERT.　The　inter-annual　trends,　correlation　with　GDP　and　population,　spatial　distribution　characteristics,　contributions　from　various　vehicle　types　for　the　ten　pollutants　emissions　were　analyzed.　Results　showed　that　the　emissions　of　the　above　ten　pollutants　changed　from　approximately　576.9　Gg,　130.0　Gg,　8.1　Gg,　2.1　Gg,　1.0　Mg,　1.1　Mg,　1.4　Mg,　0.5　Mg,　7.4　g　and　15.6　gin　1999　to　193.8　Gg,　171.1　Gg,　79.1　Gg,　117.8　Gg,　3.5　Mg,　6.7　Mg,　6.8　Mg,　2.9　Mg,　37.6　g　and　79.1　gin　2014,　respectively.　Implementation　of　stringent　sulfur　content　limit　during　the　past　decade　reduced　approximately　94.4%　of　the　SO2　emission　in　2014.　CH4　and　N2O　increased　from　1999　to　2011,　but　began　to　decrease　since　2012;　NH3　emission　had　the　highest　annual　average　change　rate　(355%)　from　1999　to　2014;　PAHs,　di-oxins　and　furans　increased　continuously　during　the　past　decade.　The　vehicular　emissions　were　higher　in　Guangdong,　Shandong,　Henan,　Jiangsu,　Zhejiang　and　Hebei.　Good　linear　correlation　between　vehicular　emissions　and　GDP　was　found　(except　SO2);　in　the　provinces/municipalities　with　higher　population　density,　the　emission　density　was　also　larger,　indicating　more　significant　vehicular　emissions＇　potential　damage　on　human　health.　HDT　and　PC,　PC　and　MC,　PC　and　BUS　were　the　major　contributors　to　SO2,　CH4,　N2O　emissions,　respectively.　In　2014,　PC　was　the　dominant　contributor　to　NH3　emission;　PC,　BUS　and　HDT　had　higher　fraction　in　the　total　IPY　and　BaP　emissions;　HDT　was　the　major　contributor　to　BkF　and　BbF　emissions.　In　addition,　the　uncertainties　of　estimated　emissions　were　also　analyzed　based　on　Monte　Carlo　simulation.　(C)　2016　Elsevier　B.V.　All　rights　reserved.