From: ahk@chinet.com   
      
   Jishnu Mukerji  wrote:   
   >On 12/22/2015 10:46 AM, Adam H. Kerman wrote:   
   >>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.   
      
   >>Hm. I don't understand the purpose, then.   
      
   >The purpose is to indicate that Rule 281a must be followed, as opposed   
   >to Rule 281 for a non-flashing green.   
      
   I don't have NORAC signal rules handy. Looking for something on the Web,   
   I came up with a scanned page with Rule 281 and Rule 281b, but no   
   Rule 281a.   
      
   You're making it sound like the wayside signal is instructing the   
   engineer to obey the speed restriction displayed by the cab signal. Doesn't   
   the wayside signal have the ability to convey the necessary information?   
      
   I'll keep looking and do some more reading.   
      
   >Effective last Saturday all of NEC South between New York and Washington   
   >DC (barring about 7 miles of low speed limit trackage) is operating   
   >under ACSES.   
      
   Is the low speed limit enforced, or are engineers expected to obey   
   the order?   
      
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