The　research　embodied　in　this　paper　presents　the　characteristics　of　pedestrians　and　bicycles　conglomeration　of　the　green　time　on　the　crosswalks,　so　as　to　study　the　signal　control　strategy　and　the　traffic　simulation　of　the　signalized　intersection.　Firstly,　a　new　definition　of　the　pedestrians　and　bicycles　conglomeration　is　presented　under　analyzing　the　releasing　characteristic　in　the　signalized　intersection　crosswalks　of　green　time.　Then,　a　new　method　is　used　which　is　that　the　crosswalk　is　divided　for　many　uniform　suppositional　grids.　Based　on　this　new　method　of　suppositional　grids,　the　shape,　the　area,　the　position,　as　well　as　the　occupation　ratio　of　the　space　of　the　pedestrians　and　bicycles　conglomeration　is　described.　Finally,　the　signalized　intersection　of　Beijing　pingleyuan　is　taken　for　example,　with　the　new　method　the　occupation　ratio　of　the　space　of　the　pedestrians　and　bicycles　conglomeration　is　calculated.　The　result　shows　that　the　occupation　ratio　of　the　space　of　the　conglomeration　increases　during　the　movement　processes.