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Transponders keep it all in order

From first to 43rd, NASCAR officials always know the order, timing and scoring for Nextel Cup races thanks to transponders mounted on the fuel cell of each race car.

Updated: June 20, 2007, 7:37 PM ET
By Brett Borden | Special to ESPN.com

There was a time when human beings were relied upon to manually track the laps and running order of the field at each NASCAR race. Those days are long gone.

Today, wireless devices surround each race track and feed the track position of each car to the centrally located timing and scoring computers in the scoring tower. It's all done using a redundant fiber optic system with transponders that are mounted to the fuel cells of each race car.

Of course, human beings still have to ...

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