Pedestrian　dynamics　model　may　play　an　important　role　in　planning　and　design　of　public　facilities.　Based　on　passenger　behavior　and　movement　on　bus　transit　stop,　a　2-dimensional　cellular　automata　model　for　simulation　of　passenger　dynamics　was　presented.　The　model　introduced　the　static　floor　field　and　dynamic　floor　field　to　deal　with　passenger　features　of　dynamical　speed　on　the　basis　of　pedestrian　density　and　terminal　cost　change,　and　could　carry　out　direction　choice　and　movement　decision　in　high　density　environment.　Compared　with　the　existing　models,　this　model　is　more　precise,　making　its　simulation　results　more　realistic.　Copyright　ASCE　2009.