In　the　big　cities　of　China,　pedestrians　and　bicycles　have　a　great　impact　on　the　capacity　of　right-turn　lane　vehicle　movement　at　signalized　intersections.　In　most　cases,　pedestrians　become　the　main　factor　in　the　capacity　of　movement　in　the　right-turn　lane,　This　paper　attempts　to　explore　the　potential　capacity　of　right　turn　movement　when　there　are　conflicts　between　right-turn　vehicles　and　pedestrians　at　signalized　intersections.　In　order　to　take　this　impact　into　account　in　the　capacity　calculation,　it　is　assumed　that　all　pedestrians　obey　the　traffic　regulations,　which　means　pedestrians　cross　the　intersection　only　when　the　pedestrians＇　signal　indication　is　on.　The　objective　of　this　study　is　to　quantitatively　analyze　the　impact　of　pedestrians　on　the　capacity　of　right-turn　vehicles　at　signalized　intersections　with　regard　to　different　signal　phases.　In　order　to　reach　this　objective,　a　new　concept　of　＇Pedestrian　Group＇　is　introduced　in　this　paper,　where　the　capacity　model　of　the　right-turn　lane　at　signalized　intersection　is　based　on　gap　acceptance　theory.　The　results　of　this　study　has　great　importance　for　the　development　of　capacity　analysis　and　our　own　Manual.　©　2009　ASCE.