The　traffic　flow　parameters　of　the　basic　segment,　diverging　and　converging　section,　weaving　section,　and　directional,　semi-directional　and　loop　ramp　of　these　three　interchanges　were　collected　by　field　experiment.　The　simulation　model　of　typical　vehicle　desired　speed,　deceleration　and　acceleration,　and　lane　changing　model　on　converging　and　diverging　section　were　calibrated　and　validated　with　field　collected　datum　within　VISSIM　software.　The　speed　-　flow　curves　of　different　segments　of　the　interchange　were　determined　by　simulation　experiments.　And　these　curves　can　be　used　to　obtain　the　capacity　of　whole　of　interchange　and　different　segments　of　the　interchange.　Density　was　regarded　as　classification　index　of　level　of　service　and　flow-density　curves,　which　represents　the　operating　conditions　in　interchange,　was　developed　through　simulation　datum.　And　through　these　curves　level　of　service　of　the　interchange　were　discussed.　Finally,　the　capacity　and　level　of　service　of　diverging　section,　converging　section,　weaving　section　and　all　kinds　of　typical　ramps　and　whole　of　interchange　are　provided.　©　2011　ASCE.