https://en.wikipedia.org/wiki/Split-flap_display says one of the few remaining   
   Solari mechanical flip boards in the U.S. is in the Route 128 Amtrak station   
   near Boston.  But it must have been removed, since I didn't see it on a recent   
   trip.   
      
   Nor were there any other signs, digital, mechanical, or static, to explain   
   which platform a train would arrive on.  Fortunately I knew which way was   
   north and figured it out.   
      
   And for no reason, they make you go up, across, and down to go to the closest   
   platform.  There isn't a track between it and the station building.   
      
   Jimmy   
      
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