Urban　rail　transit　systems　constructed　along　demand-oriented　corridors　will　supply　the　main　travel　mode　to　most　commuters　in　their　commute　trip-chains.　However,　in　residential　areas,　a　long　walking　distance　from　home　to　stop　makes　travelers　take　a　private　mode.　To　date,　the　conventional　approach　has　limitations　when　applied　to　residential　areas,　as　the　radial　and　tidal　characteristics　of　trips　start　from　rail　stations.　For　the　purpose　of　urban　rail　transit　feeder　bus　system　planning,　the　positioning　and　selection　of　feeder　stops　are　critical　to　the　efficiency　of　subsequent　route　arrangement,　and　a　set　of　stops　that　mainly　affects　the　average　value　of　walking　distance　must　be　selected　in　the　first　step.　This　paper　discusses　a　double　circulation　method　developed　to　get　the　required　stop-set　using　an　optimal　model,　given　the　threshold　value　of　Average　Walking　Distance.　The　subsets　selected　during　the　process　should　make　each　planning　zone　have　at　least　one　stop　that　serves　commuters,　and　two　questions　will　be　answered:　1)　How　many　required　stops　should　be　selected　to　satisfy　the　threshold　value　of　AWD?　and　2)　Which　alternative　stops　can　be　chosen　in　the　required　stop-set?　Thus,　the　outcomes　can　assure　both　larger　site　coverage　and　less　travel　time.　©　2011　ASCE.