From: Sam.Wilson@ed.ac.uk   
      
   In article ,   
    John W Gintell  wrote:   
      
   > On 6/17/16 6:31 PM, Larry Sheldon wrote:   
   > With current technology all grade crossings could be properly guarded with   
   > gates   
   > that wouldn't go down if there was a vehicle in it and would start going down   
   > at   
   > the right time based upon the train speed. This could be linked to the train   
   > controls as well so a train could be stopped in time in case there is a   
   > vehicle   
   > on the tracks.   
   >   
   > This would eliminate accidents and allow trains to travel faster.   
      
   Given the distance and time it takes a train to stop it would also   
   hugely increase the time the crossing was closed to road traffic.  We   
   have this discussion often in the UK.  It would probably be even less   
   acceptable in the US where road transport is even more important than   
   here.   
      
   Sam   
      
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