This　paper　attempts　to　explore　the　potential　capacity　of　right　turn　movement　when　there　are　conflicts　between　right　turn　vehicles,　pedestrians,　and　bicycles　at　signalized　intersections.　In　order　to　take　this　impact　into　account　in　the　capacity　estimation,　it　is　necessary　to　assume　that　all　pedestrians　and　bicycles　observe　the　traffic　regulation,　which　means　pedestrians　cross　intersections　only　when　the　pedestrian＇s　signal　indication　is　on.　The　objective　of　this　study　is　to　quantitatively　analyze　pedestrians＇　and　bicycles＇　impacts　on　the　capacity　of　right-turn　vehicle　at　signalized　intersections.　New　concepts　of　＇pedestrian　group＇　and　＇equivalent　factor　of　bicycle　versus　pedestrian　(PBF)＇were　introduced　in　this　paper.　The　PBF　was　computed　and　its　value　is　1.7.　With　these　concepts,　a　pedestrian-grouping　based　model　was　developed　to　estimate　the　potential　capacity　of　right　turn　movement　under　green　indication.　The　model　was　calibrated　using　the　collected　data　from　eight　signalized　intersections　of　Beijing　and　proved　robust　after　hypothetic　test.　©　2010　ASCE.