Quote:
Originally Posted by Randomguy34
If this means the ROW is no longer usable for HSR, would the only other option be to bury the Metra tracks and have a future HSR use Metra's ROW?
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Well, presumably the best use of a West Loop rail tunnel is for regional trains, and not for intercity/HSR.
From an engineering standpoint, this corridor saves a ton of money. There's already a complicated web of infrastructure here, with the Kennedy and the Blue Line running below grade, Metra tracks and streets running at-grade, and Halsted/Desplaines and the UP-W tracks runing above grade. The "HSR corridor" is by far the most cost-effective way to weave through this thicket, because it allows trains to go over the Hubbard's Cave trench and the Blue Line tunnel instead of deep beneath them.
The alternative is that you start your rail tunnel near Kinzie/Racine for another 1/2 mile of tunneling and just dive under everything in the way. If the costs are similar to San Francisco's DTX tunnel, that is a whopping $1bn for the extra 1/2 mile of tunneling - the cost of another Circle Interchange project, and probably 3x the cost of the proposed tower at 357 N Green.