PTC - POSITIVE TRAIN CONTROL SYSTEM
The PTC on board apparatus will be considered having failed if any of the following conditions occur:
- The audible indicator fails to sound when the speed limit display changes to a more restrictive speed; - The audible indicator continues to sound even though the speed limit change was acknowledged, and the speed of the train was reduced to the speed required; - Damage occurs to any parts of the PTC on-board apparatus; - The on-board apparatus experiences or displays an internal failure which results in a penalty break application; - The speed limit indicator displays a speed higher than normal speed for 3 miles.
The PTC apparatus on the leading end of the first engine or control car of each equipped train must be tested and found to be operational within ____ _______ before the engine or control car leaves its initial terminal.
24 hours.
In accordance with NORAC RULE 135 D PTC will enforce speed of ____ MPH for passenger trains and _____ MPH for OTHER than passenger trains when operating through working limits after the TSR Zero is released at the stop sign.
40 - 25
Transponder
A device mounted between the rails that transmits location specific information to trains equipped with on board PTC apparatus.
Construction Zone
A location designated by Bulletin Order or Form D where PTC is active but is not enforcing civil speed, Positive Train Stops, or TSRs.
Data Radio
A radio used on PTC equipped trains and fixed sites to send and receive PTC data updates and information.
Aspect Display Unit (ADU)
An in-cab unit displaying cab signal aspects.
TRUE OR FALSE: PTC will ALWAYS enforce a positive train stop.
FALSE - PTC MAY NOT enforce a positive train stop; for instance when the train misses a transponder.
Initial Terminal
Location where train is originally made up or a locomotive receives its Calendar Day Inspection.
All trains operating in PTC territory must be equipped with ____ ___________. The movement of a train not equipped with PTC apparatus is _______________.
PTC apparatus - prohibited
Positive Train Stop (PTS)
The stop enforced by the PTC system that prevents the train from passing a controlled signal.
If the on-board PTC apparatus fails en route, the Engineer must take what actions:
a. cut out the on-board PTC apparatus b. notify the Conductor and Dispatcher as soon as possible without delay to the train. c. operate according to track and signal speed limits subject to the following limitations: - in ABS territory with operative CSS, not exceeding 79 MPH; - in ABS territory without CSS, not exceeding 59 MPH for passenger trains, 40 MPH for trains transporting poisonous-by-inhalation (PIH), or 49 MPH for all other trains; In non-signaled DCS territory, operate at restricted speed until notified of absolute block protection, then not exceeding 40 MPH or 30 MPH if transporting PIH; d. Consider the failed on-board PTC apparatus as inoperative until the apparatus has been repaired, tested and found to be functioning properly.
A train instructed to operate at restricted speed on account of a bridge strike must operate at ____________ ____________ not exceeding _____ _______.
restricted speed - 15 MPH
PTC enforcement does not relieve employees from their responsibility for maintaining __________ ____________ of _____________ _______________ and _________ speeds.
through knowledge - physical characteristics - track.
