Railway Signaling Quiz

Track Circuit and Signaling

• A track circuit is a section of track that is electrically isolated from the rest of the track system, providing a safe and reliable means of detecting the presence of a train.

Bell Codes

• The bell code for a train out of section is typically "2-2" and is preceded by the "call attention" signal.
• The bell code for a class 6 freight train is "3-3" and the train is permitted to operate at a maximum speed of 40 mph.

Facing Point Lock

• A facing point lock is a type of interlocking system that prevents a switch from being moved while a train is occupying the section of track leading up to the switch.

Clearing Point Procedures

• After seeing a train's tail lamp, there are three ways a train can leave the clearing point:
  • By making a scheduled stop at the next station
  • By receiving permission from the dispatcher to proceed
  • By following the rules and procedures for leaving the clearing point