Sweep up marbles during yellows?


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#1  05-26-2008 07:42 AM
 Sweep up marbles during yellows?
Many Indy drivers get into trouble when they get "up in the marbles."  Why don't they send some sort of street sweepers - special Indy 500 street sweepers - onto the track during yellow flags to sweep up the marbles??   Look at those cool orange safety trucks they have.  With all the technology, how hard would it be to design a special truck that sweeps debris out of the corners??
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#2  05-31-2008 10:39 AM
 Sweepers/Marbles
They don't need special trucks.  Many tracks use regular street sweeper trucks to clean debris from the track.  Tracks also use the jet blowers to blow debris from the track surface.  CART/Champcar would often run a sweeper along the top/outside of the turn on an oval and use the jet blower to push everything else down and off the track.   

There were some very long yellows this year.  Maybe they did some work on the marbles but they do build up again.  From the tv coverage, I couldn't tell much as to what they were doing during these extending yellows.   
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