The National Academy of Sciences (NAS) is conducting a study on the various security credentials that drivers transporting hazardous materials must obtain. The American Trucking Associations requested this study to obtain data on redundant security credentials and help make the case for a consolidated credential. In connection with this effort, the NAS contractor has designed a web-based driver survey. Please ask your drivers to complete this survey, which takes less than five minutes and does not solicit any personal information.