An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Phase II of the Track Database Auditing System (TDAS) program sought to produce a system development and implementation plan with a more comprehensive outline of the project approach and goals, as well as further refine the Concept of Operations (ConOps) and system requirements developed in the...
The work conducted by TTCI took place under this Phase II research. The appendices includes the following: the System Development and Implementation Plan; the revised Concept of Operations (ConOps) document from Phase I; an updated System Requirements Specification document from Phase I; the...
The Federal Railroad Administration wants to better understand driver knowledge of and expectations for finding Emergency Notification System (ENS) signs at highway-rail grade crossings. A simulator study was designed where participants were exposed to ENS signs of different orientations (...