This　paper　applies　the　cluster　analysis　method　to　categorize　the　17　sample　companies　in　a　high-tech　park　in　terms　of　their　workshop　area.　First　of　all,　the　annual　freight　traffic　volume　per　unit　workshop　area　has　been　used　as　the　index　to　cluster　the　17　sample　companies　into　4　groups.　The　results　show　that　each　group　of　companies　produces　the　similar　products.　Secondly,　the　workshop　area　or　site　area　of　a　company　correlates　well　with　its　annually　generated　freight　traffic.　The　regression　analysis　shows　a　linear　correlation　between　the　workshop　area　(or　site　area)　of　the　company　and　its　annual　freight　traffic　volume.　These　models　can　be　applied　to　predict　the　freight　traffic　volume　for　the　planning　high-tech　park.　©　2009　ASCE.