with　the　rapid　development　of　cooperate　vehicle-infra-structure　system　technologies,　vehicle　can　communicate　with　each　other　and　road　side　facilities　to　provide　safety　alerts　and　improve　efficiency.　This　study　aiming　at　improving　road　safety,　efficiency　and　meanwhile　reduce　fuel　consumption　at　urban　expressway　weaving　area　by　a　control　algorithm　base　on　CVIS.　This　control　algorithm　were　based　on　our　previous　work　on　driving　behavior　and　divided　into　three　phases,　lane　changing　at　upstream　base　on　destination,　main　road　platoon　forming　and　yield　to　ramp　traffic,　weaving　lane　platoon　forming　and　yield　to　main　road　exit　traffic.　The　result　of　evaluation　including　three　aspects,　efficiency,　safety　and　fuel　consumption,　all　three　show　positive　improving.　Evaluation　was　developed　base　on　Vissim　and　C#.　©　2016,　UK　Simulation　Society.　All　rights　reserved.