Interlockings Flashcards
1
Q
BLOCKING DEVICE REMOVED (BDR) CODE
A
a computer generated, unique, random number transmitted from the Operations Control Center (OCC) to a Roadway Worker-in-Charge (RWIC) before fouling a track or beginning work where CTC or Interlocking Rules apply.
2
Q
INTERLOCKING
A
an arrangement of signals and appliances so interconnected that their movements must succeed each other in proper sequence and for which interlocking rules are in effect.
3
Q
INTERLOCKING APPLIANCE
A
a movable apparatus within an interlocking that either allows or prevents movements over designated routes, including switches, movable frogs, mitre rails, and derails.
4
Q
INTERLOCKING LIMITS
A
the tracks between the extreme opposing signals of an interlocking.
