On Thursday, December 24, 2015 at 10:09:51 AM UTC-5, Jishnu Mukerji wrote:   
      
   > 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 completely superseded by color position light system on the NEC.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.   
      
   I believe much of the Long Island Rail Road and ex PRR SEPTA lines   
   still use the amber position light signals, though upgrades may   
   have eliminated some signals.  FWIW, relatively new pictures on   
   nycsubway of the LIRR trunk line show signal bridges with PRR   
   style signals.   
      
   I don't know about former PRR lines now owned by freight carriers.   
      
   Didn't the Norfolk & Western, once owned by the PRR, also use the amber   
   position light system?   
      
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