InfoMap™ of NORAC CSS Operation And Failure Rules - Version 6/08
Rule 550: Train Has No Cabs
Auth: Timetable
Mvmt: By fixed Sigs, RS,
unless→→→→→→→→
Rule 561: Bad Code In Rail
Auth: Dspr or Form D/11
Speed CS c/o, Cabs c/i.
Mvmt: By Rule 556 or 562.
More detail:

Abbrevations: (not official - don't use on Ds)
Auth = Authority/Authorization
Cabs = Cab Signal(s)
c/i = cut in, c/o = cut out
ClrToNxtInt = Clear To Next Interlocking
D/X = Form D, line X
Inop = Inoperable
Mvmt = Movement
Perm = Permission
PTS = Prepared to stop
RS = Restricted Speed
SC = Speed Control
S&P = Stop And Proceed (signal)




→
    ↓
    ↓
    ↓ Dspr
    ↓ auth.
    ↓ rule 556
    ↓
    ↓
    ↓
     → → → →
Rule 554: Cab Sig Failure
Mvmt: By fixed / cabs.
  • No passing S&P/Restricting
  • Notify Dspr & Cndr.
  • Cabs Inop.
  • ≤40mph unless...
    •      ↓
        ↓ Dspr auth.
        ↓ rule 556
    		 
    Rule 556: Faster Mvmt Perm
    Mvmt: By fixed / cabs.
  • No passing S&P/Restricting
  • Notify Dspr & Cndr.
  • Cabs Inop.
  • Normal speed ≤79mph
    • Rule 562: No Fixed Sigs
    Mvmt: By fixed Int Sigs & cabs between them. If sigs don't conform: More restrictive governs.
    Reverse Mvmt: Dspr , RS
    If cabs fail:
  • (no signal restriction)    
  • Notify Dspr & Cndr.
  • Cabs Inop.
  • RS (Cndrs ♥) unless 280a or 563→

    • If cabs work, SC/ATS fail:
  • (no signal restriction)    
  • Notify Dspr & Cndr.
  • Failed apparatus Inop.
  • ≤40 mph, unless 280a or 563→
    • If Engr not on leading end: RS, unless 280a or 563→→→→
    If field portion inop: Dspr notifies Engr. (more...), then CrlToNxtInt or Form D/6+2 for DCS or Form D/13 to do RS to next Int.







    →
        ↓
        Dspr
        will display
        ClrToNxtInt
        ↓
         → → → →
        ↓
        ↓
        Dspr cannot
        display
        ClrToNxtInt;
        D/13 auth.
        instead
        ↓
        ↓
         → → → →
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    Rule 280a: ClrToNxtInt
    Mvmt:On fixed signal (and cab signal indication, if operable). unless...(more).
  • Normal speed ≤79mph



    • Rule 563: Form D Auth.
    Mvmt: Like DCS rules:
  • Approach home Sigs PTS, unless...
  • Approach non-Int facing point SW PTS, unless D/13 says otherwise.
  • Xing gates work for 20", unless D/13 says otherwise.
  • Normal speed ≤70mph
    • Copyright ©2005-08 George K. All Rights Reserved