andrel <a_l### [at] hotmailcom> wrote:
> Did you, or the person that came up with this idea, actually do the math 
> for these three reference systems? just curious.

  Not me, but the math has been done, of course.

  From the reference point of the track, both trains contract by a
certain amount and can pass each other on the double track.

  From the reference point of one of the trains the double track is
contracted, but the other train is contracted even more. From this
reference point the other train is so short that it travels the double
track in the same time as this train.

-- 
                                                          - Warp

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