If train sees an all green proceed wayside signal, but PTC is warning engineer to slow and prepare to stop, who do you believe? Or worst case, all red signal but PTC shows "full speed ahead, you have the road"? I assume this falls in same category as an imperfect signal head(s) aspect, requiring stop and await DS orders.
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I'm going to go out on a limb and say...
...the most restrictive indication prevails, until the dispatcher tells you otherwise.
And even then, assume
until normality resumes.
---PCJ
One of the General Rules is, and always has been, "In case of doubt, the safe course must be taken."
Therefore, in such a situation the proper action would be to stop the movement until the conflict can be resolved.
If your asking if you have a favorable clear signal,and PTC shows either a more restricted speed than the posted is or a yellow fence shows up, you run the restricted speed indicated and notify "Backstop" at PTC help desk.
No matter what, you run the speed that PTC dictates. Failure to do so could result in an enforcement which sets a penalty brake up.
And restricted speed in PTC territory is 18 mph.
That also includes when bringing a train into PTC territory up to the first signal entering PTC trackage. You run 18 mph until the train us completely on the main,then you select that track.
Why 18 mph? I thought resrticted speed was in a multiple of 5 like 15 or 20?
Dominic Mazoch posted:Why 18 mph? I thought resrticted speed was in a multiple of 5 like 15 or 20?
I would tend to think that the 18 MPH given, would be the maximum allowed by PTC, but there is always the "must be able to stop short of any obstruction, and a speed of not more than half your field of vision".
Hopefully this will help with understanding:
When the PTC display does not conform with a wayside or cab signal indication, maximum authorized speed, mandatory directive, timetable, or special instruction, be governed by the most restrictive.
The PTC system may only be cut out or disabled when authorized by rule or train dispatcher.
When required to move at restricted speed, movement must be made at a speed that allows stopping within half the range of vision short of: Train, Engine, Railroad car, Men or equipment fouling the track, Stop signal or Derail or switch lined improperly.
When a train or engine is required to move at restricted speed, the crew must keep a lookout for broken rail and not exceed 20 MPH.
PTC will enforce you on the NS if you run above 18 mph on restricted speed if your using PTC.
Also the dispatcher still controls to a degree your signal along with auto router.
PTC reads the track line,or selected route established for each train. PTC is suppose to tell you the upcoming events you will encounter while traveling down the rails . Its main purpose is to prevent a train from blowing by a stop signal and running too fast.
But it also works in conjunction with MOW on work zones.
Cannot speak for other railroads, just the one I work for.
Subject title reminds me of “Murder by Death” and Charlie Chan. 😄
Larry
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