From: jishnu@nospam.verizon.net   
      
   On 12/22/2015 10:46 AM, Robert Heller wrote:   
   > At Tue, 22 Dec 2015 09:31:05 -0500 Jishnu Mukerji  wrote:   
   >   
   >>   
   >> On 12/21/2015 4:26 PM, Stephen Sprunk wrote:   
   >>> On 21-Dec-15 12:23, hancock4@bbs.cpcn.com wrote:   
   >>>> Would anyone know the specific indication of the following signal:   
   >>>>   
   >>>> At an interlocking, a flashing green light over a red light.   
   >>   
   >>> ...   
   >>> NORAC has no flashing green over red aspect on   
   >>> a regular signal.   
   >>   
   >>   
   >> Not true.   
   >>   
   >> Rule 281a at a Home signal showing flashing green over red means cab   
   >> speed clear. Quite common at least on the NEC.   
   >   
   > Isn't the NEC still mostly the old Pennsy position light system and not the   
   > same as colored light NORAC system used elsewhere?   
      
   NORAC signal rules show equivalences between colored light system and   
   the Pennsy position light system, which by the way has been almost   
   completely superseded by color position light system on the NEC. There   
   are multiple ways of indicating which rule applies through various   
   signal systems as specified in NORAC.   
      
   Operationally NEC is primarily cab signaled system with ACSES overlay.   
   They are progressively removing trackside block signals, and just   
   keeping the trackside Home signals. Specially in high density traffic   
   areas like between Newark and New York, the blocks are now so short that   
   having trackside signals would make it very very confusing.   
      
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