In　the　course　of　traffic　impact　analysis　(TIA),　confirming　the　number　and　location　of　construction　project　accesses　for　vehicles　(CPAV)　is　an　important　analytical　content　of　the　TIA.　There　is　a　shortage　of　efficient　methods　to　design　a　CPAV.　Therefore,　based　on　a　characteristics　analysis　of　686　vehicle　accesses　from　189　TIA　projects　in　Beijing,　42　survey　locations　were　chosen　as　study　objects　for　this　research.　After　analysis,　headway　samples　were　collected　from　the　42　locations,　a　mathematical　model　was　set　up　to　analyze　the　capacity　of　the　CPAVs,　and　queuing　theory　was　used　to　evaluate　the　level　of　service　(LOS)　of　the　CPAVs.　Finally,　a　systematic　analysis　methodology　is　proposed　to　establish　the　guidelines　for　the　determination　of　access　location.　©　2010　ASCE.