From: marc.gr.vandyck@invalid.skynet.be   
      
   rcp27g@gmail.com explained on 13-02-15 :   
      
   > or putting in positive singalling   
   > control on others (ie where the crossing is protected by railway signals that   
   > aren't cleared for the train until the barriers are down and the crossing   
   > positively checked to be clear).   
      
   This is perfectly feasable but requires to order the gates to go down   
   at a distance that is longer than the braking distance of the train.   
   This means there will be a long delay between the gate going down and   
   the train actually passing the grade crossing. As it has been   
   mentioned,   
   motorists are unpatient creatures; if the delay is too long, people   
   think the gates are faulty and start turning around them. You might end   
   up this way with a grade crossing that is inherently less safe, because   
   of human nature...   
      
   --   
   Marc Van Dyck   
      
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