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Title 49: Transportation
Subtitle B: Other Regulations Relating to Transportation (Continued)
CHAPTER II: FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 234: GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS
Subpart D: Maintenance, Inspection, and Testing
: Maintenance Standards
234.203 - Control circuits.
All control circuits that affect the safe operation of a highway-rail grade crossing warning system shall operate on the fail-safe principle.
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