The Florida DOT has just posted a 70 page report discussing TAZs and their construction. While the information is for the model users community in Florida there is a wealth of information in the report that those who think about such things will find of interest. The document is well worth adding to any list of TAZs references that you may have. The report can be found on the Florida Transportation Modeling web site at http://www.fsutmsonline.net/index.php?/site/directory/model_docs The direct link to the report is http://www.fsutmsonline.net/images/uploads/reports/FDOT_TAZ_White_Paper.pdf If other States or Regions have similar documents I wouldn't mind learning about them and adding them to our ever growing list of data related resources. -- Ed Christopher FHWA Resource Center 19900 Governors Drive Olympia Fields, Illinois 60461 708-283-3534 (v) 708-283-3501 (f) 708-574-8131 (cell)