From: HAL@hal.invalid   
      
   In article <111b24bf-a421-43fe-bdf6-e5dd0fc8e228@googlegroups.com>,   
    wrote:   
      
   > So, I see a train stopped at a red over red signal, a home signal at an   
   > interlocking (no number plate).  The train sat there for a few minutes,   
   > then slowly moved ahead (presumably at restricted speed).  There was   
   > a railroad work truck at the switch.   
   >   
   > Presumably the train had authority to do so.   
   >   
   > Anyway, what does it take for a train to move against a red signal?   
   > Is a radio transmission from the dispatcher enough?   
   >   
      
   A dispatcher can give permission by radio transmission for a train to   
   proceed past a stop signal.   
      
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