Quote:
Originally Posted by Sir.Humphrey.Appleby
Can't really bore 8th Ave very easily with the tie in to existing tunnels at city hall, no good launch sites, and the depth it is notionally planned at (trains running on what would be the 'P2' level of most towers)
Even then, with the number of stations planned you are going to have multiple station boxes at almost full avenue width at least 130m long, plus likely two needed crossover boxes near each end. So you are going to have huge holes either way.
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I would also guess that there are tons of sub-surface utilities that use the 8th Ave ROW that would need to be relocated - this would also require huge holes.
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