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Adding the track in existing corridor for a high speed dedicated passenger line and low speed freight/suburban local line with common passing loops can make the crossing problem a lot more straightforward.

I'm not sure I understand your argument. Do you mean turning a single-track line into two parallel single-track lines, with shared passing loops? Or do you mean turning a single-track line into one double-track line, with all train types using both tracks? In either case, I note that the very use of passing loops is a limiting factor (making freight much slower), and you need the more the bigger the difference between top speeds.

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

by DoDo on Wed Jan 24th, 2007 at 05:35:14 AM EST
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