To　determinate　the　expressway　capacity　near　a　bus　bay　stop　with　an　access,　capacity　models　on　the　expressway　near　a　bus　stop　with　an　access　were　developed　on　the　basis　of　gap　acceptance　theory　and　queuing　theory.　Depending　on　a　bus　stop　position　to　an　entrance　or　an　exit　ramp,　the　capacity　models　were　developed　for　four　cases.　Bus　bay　stops　with　overflow　and　bus　bay　stops　without　overflow　were　considered.　A　comparison　of　simulation　experiment　and　model　calculation　was　carried　out.　Results　show　that　the　suggested　models　have　high　accuracy　and　reliability,　at　bus　arrival　rate　below　60　vehicles　per　hour　(veh/h)　or　vehicle　volumes　at　the　entrance　and　the　exit　below　200　passenger　cars　units　per　hour　(pcu/h),　and　there　are　no　significant　difference　in　the　capacities　for　four　cases.　When　bus　arrival　rate　is　above　240　veh/h,　the　capacities　of　all　four　cases　will　decline　rapidly.　With　berth　number　increasing,　the　increasing　of　the　capacities　is　no　obvious　for　four　cases.　As　the　bus　arrival　rate　and　vehicle　volumes　at　the　entrance　and　the　exit　increase,　bus　stops　located　downstream　of　an　entrance　and　upstream　of　an　exit　have　a　remarkably　effect　on　the　capacities.　The　latter　case　is　much　heavier　than　the　former.　Those　results　can　be　used　to　traffic　design　and　optimization　on　urban　expressway　near　a　bus　stop　with　an　access.