A Practical Risk Assessment Methodology for Safety-Critical Train Control System

This document is disseminated under the sponsorship of the Department of Transportation (DOT) in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. The information contained herein constitutes sponsored research only. It shall not be considered either a statement of, or a change from, any DOT policy or position, including the Federal Railroad Administration (FRA)/Federal Transit Administration Joint Statement of Agency Policy Concerning Shared Use of the Tracks of the General Railroad System by Conventional Railroads and Light Rail Transit Systems. Furthermore, end users of any results forthcoming from this document should be aware that the waiver process shall remain in its entirety when a rail operator desires to introduce any procedure or equipment that does not meet FRA requirements on any railroad under FRA's jurisdiction.