FHWA Safety Program
FHWA-SA-12-020
October 12, 2012
Quality Assurance Statement
This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the data published herein. The contents do not necessarily reflect the official view or policies of the Federal Highway Administration (FHWA). The U.S. Government assumes no liability for the use of the information contained in this document. This report does not constitute a standard, specification, or regulation.
Notice
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Quality Assurance Statemen
The Federal Highway Administration (FHWA) provides high-quality information to serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.
Acronyms
Term | Definition |
---|---|
AHWS | Automatic Highway Warning System |
AREMA | American Railway Engineering and Maintenance-of-Way Association |
ATC | Advanced Transportation Controller |
CFR | Code of Federal Regulations |
DIR | Direction of Train |
FHWA | Federal Highway Administration |
FRA | Federal Railroad Administration |
HRI | Highway Railroad Intersection |
ICO | Island Circuit Occupied |
IEEE | Institute of Electrical and Electronics Engineers |
IMSA | International Municipal Signal Association |
LTI | Long Term Obstacle Indicator |
MUTCD | Manual on Uniform Traffic Control Devices |
NEMA | National Electrical Manufacturers Association |
NGD | Entrance Gate Down |
NGP | Entrance Gate Present |
NGU | Entrance Gate Up |
NTSB | National Transportation Safety Board |
PEA | Preemption Warning Active |
PER | Preemption Relay |
PSP | Product Safety Plan |
RSO | Roadway System Operational |
RSPP | Railroad Safety Program Plan |
SO | System Operational (railroad) |
TPD | Train Presence Detection |
USDOT | United States Department of Transportation |
VAS | Vehicle Arrestor Barrier Status |
VP | Vehicle Presence |
WSA | Warning System Active |
XGD | Exit Gate Down |
XGP | Exit Gate Present |
XGU | Exit Gate Up |
XR | Grade Crossing Relay |