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I wanted to post in the Infrastructure against delays article but I'm too late, so I'll post it here:  For the mallard operation you can even use passing loops which are smaller than both trains - there are various illustrations of the exact sequence for low speed trains involving cutting off the ends and reshuffling - but at speed this is impractical and the delay horrific.  The solution is to rely on the Lorentz contraction and travel fast enough that both trains are considerably shorter than the loop.
by njh on Fri Jul 11th, 2014 at 12:11:14 AM EST
The solution is to rely on the Lorentz contraction

LOL! ;-)

*Lunatic*, n.
One whose delusions are out of fashion.

by DoDo on Fri Jul 11th, 2014 at 01:45:53 AM EST
[ Parent ]
Just remember: from train's reference point, it is the track that is contracting :-)
by das monde on Fri Jul 11th, 2014 at 02:09:03 AM EST
[ Parent ]
But the train moving in the opposite direction is contracting even more.

- Jake

Friends come and go. Enemies accumulate.

by JakeS (JangoSierra 'at' gmail 'dot' com) on Fri Jul 11th, 2014 at 02:58:19 AM EST
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