From: jishnu@nospam.verizon.net   
      
   On 8/18/2014 8:24 PM, hancock4@bbs.cpcn.com wrote:> On Monday, August   
   18, 2014 2:22:28 PM UTC-4, Jishnu Mukerji wrote:   
   >   
   >> I think the paper timetables are pretty useless these days except as   
   >> collectors items for those who care for such,   
   >   
   > It's also downloadable from the Amtrak website as a PDF.  Presumably,   
   > schedule changes to individual routes are updated in the web version   
   > until a new edition is generated.   
      
   All schedule changes do not cause new version of PDF for individual   
   trains to be produced. I am not sure what is used as the threshold to   
   decide when to create a new set.   
      
   However, the changes are very often just a few minutes this way ir that   
   to account for track work, single tracking etc., so it does not matter   
   materially unless you are trying to precisely document OTP at the   
   granularity of a minute.   
      
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