49 C.F.R. § 234.233 Rail joints.
Title 49 - Transportation
Each non-insulated rail joint located within the limits of a highway-rail grade crossing train detection circuit shall be bonded by means other than joint bars and the bonds shall be maintained in such condition to ensure electrical conductivity.
Title 49: Transportation
PART 234—GRADE CROSSING SIGNAL SYSTEM SAFETY
Subpart D—Maintenance, Inspection, and Testing
Maintenance Standards
§ 234.233 Rail joints.
