U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
A term applied to a circuit used where it is desirable to provide a track circuit but where it is impracticable to maintain a track circuit.
Regulations most recently checked for updates: Aug 27, 2025
A term applied to a circuit used where it is desirable to provide a track circuit but where it is impracticable to maintain a track circuit.