From: ruben@mrbrklyn.com   
      
   On 07/11/2018 04:59 PM, Clark F Morris wrote:   
   > PTC will also enforce temporary speed restrictions and permanent ones.   
   > Most of the ATS systems I have read about only enforce stop signals   
   > where PTC will enforce all signals.  ATS probably would not have   
   > prevented either the Philadelphia crash or the Talgo Dupont crash on   
   > the Port Defiance bypass..  PTC would have.   
      
      
   we don't want that.  We want the working system we had at half costs.   
      
      
   >The trip stops and the signaling system in general are probably past   
   > end of useful life and need to be replaced anyway.  The old system may   
   > also be more maintenance intensive.   
      
      
   Ummm no.   
      
   The new system is a maintmence nightmare.   
      
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