Modeling　life-cycle　sustainability　assessment　(LCSA)　for　pavement　alternatives　is　still　in　infant　stage.　This　paper　proposes　a　comprehensive　pavement　LCSA　methodology　that　integrated　life-cycle　cost　analysis　(C-LCA),　environmental　life-cycle　assessment　(E-LCA),　and　social　life-cycle　assessment　(S-LCA).　A　four-step　structure　was　developed　for　the　proposed　methodology,　including　system　definition,　modeling,　unifying,　and　interpretation.　First,　the　goal　and　scope　were　defined　and　pavement　alternatives　were　identified　during　the　four　main　life-cycle　phases,　including　raw　materials　and　production,　construction,　use,　and　maintenance.　Second,　pavement　C-LCA,　E-LCA,　and　S-LCA　were　measured　in　the　modeling　process,　where　the　foreground　project　and　background　inventory　data　were　collected,　and　the　various　impact　assessment　models　were　proposed.　Third,　a　multi-criteria　decision-making　model　was　applied　to　unify　the　three　sustainability　dimensions,　and　select　the　appropriated　sustainable　pavement　alternative.　Finally,　the　results　were　discussed　and　highlighted　in　interpretation　step,　and　a　sensitivity　analysis　on　weights　was　carried　out.　A　case　study　was　applied　to　illustrate　the　proposed　methodology,　including　thin　hot　mix　asphalt　concrete　layer　(THMACO),　hot　mix　asphalt　with　warm　mix　additive　Sasobit　(HMAW),　and　hot　mix　asphalt　with　reclaimed　asphalt　pavement　(HMAR)　in　Southeast　of　China.　The　results　show　that　the　recycling-based　HMAR　contributed　the　best　economic　and　social　performance,　while　HMAW　achieved　the　best　environmental　performance.　A　combined　AHP-VIKOR　model　was　applied,　and　HMAR　was　selected　as　the　optimal　alternative.　In　addition,　a　sensitivity　analysis　on　weights　was　conducted　using　21　cases.　©　2018　Elsevier　Ltd