Podcast
Questions and Answers
What is the purpose of an Interlocking Appliance?
When is an interlocking appliance considered blocked?
What defines the Interlocking Limits?
What does a Controlled Signal do?
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How is an interlocking appliance considered secured?
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What does a Signals Block Limit Signal indicate?
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Study Notes
Blocking Device Removed (BDR) Code
- Unique, random number generated by Operations Control Center (OCC) to Roadway Worker-in-Charge (RWIC) before fouling a track or starting work under CTC or Interlocking Rules
Interlocking and Interlocking Appliances
- Interlocking: arrangement of signals and appliances that must follow a specific sequence
- Interlocking Appliance: movable apparatus that allows or prevents movements over designated routes, including switches, movable frogs, mitre rails, and derails
- Blocking an Interlocking Appliance: applying an approved device to the control console to prevent operation
- Securing an Interlocking Appliance: applying an approved device to prevent operation, or electrically disabling and mechanically locking the appliance in the required position
Interlocking Limits and Signals
- Interlocking Limits: tracks between the extreme opposing signals of an interlocking
- Signal Block Limit Signal: fixed signal indicating the limit of a block under Manual Block System (MBS) rules
- Cab Signal: signal in the engine control compartment indicating a permissible speed
- Controlled Signal: fixed signal capable of displaying a Stop indication, controlled by the Rail Traffic Controller (RTC)
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Description
Test your knowledge on railway safety terminology including 'Blocking Device Removed (BDR) Code', 'Interlocking', and 'Interlocking Appliance'. Learn about unique codes used in railway operations and the rules and appliances designed to ensure safe train movements.
