From: finfer@optonline.net   
      
   On 3/3/2016 6:36 PM, Robert Heller wrote:   
   > At Thu, 3 Mar 2016 12:00:56 -0800 (PST) hancock4@bbs.cpcn.com wrote:   
   >   
   >>   
   >> For a green over red, (Rule 281 Clear--Proceed), does it make any   
   >> difference if the signal is a home signal at an interlocking, or a   
   >> block signal with a number plate?   
   >   
   > I believe most of the time these days, the upper head of a multi-head   
   > interlocking signal is the same as a block signal for the straight route. The   
   > only 'gotcha' is that red over red [over red] (all heads showing red) always   
   > means stop right here (absolute stop) -- often because the points might not   
   be   
   > aligned or there is some other conflict (like a crossing). A single head red   
   > (simple block signal) is stop and proceed at reduced speed, expecting to stop   
   > when catching up with a train ahead.   
      
   The important thing here is that stop and proceed means stop, then   
   proceed at restricted speed (not just reduced speed).  The critical   
   thing about restricted speed is that a train is to be prepared to stop   
   within one half the range of forward vision.   
      
   There have been many accidents caused by failure to observe restricted   
   speed, including a rear end collision at Penn Station not too long ago   
   in which an Amtrak train collided with an LIRR train, fortunately at low   
   speed.   
      
      
   --   
   Michael Finfer   
   Bridgewater, NJ   
      
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