From: HAL@hal.invalid   
      
   In article <5613fd52-1293-497e-87ac-b517b14d425d@googlegroups.com>,   
    wrote:   
      
   > n the previous very similar accident about 20 years ago, they   
   > said MOW vehicles were purposely set up NOT to shunt track   
   > circuits.  This was because such units didn't always shunt, so   
   > it was felt it was best to assume they didn't.  Thus, such a vehicle   
   > wouldn't trip the signals.   
   >   
   > Is this still true?   
      
   Shunt cables are required if the foul is more than five minutes.   
      
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